How to make an origami StegosaurusステゴサウルスStegosaurus
The challenge version of a Stegosaurus with a row of jagged plates on its back, made from two sheets. The first sheet becomes the head, back plates and spiky tail; the second becomes the four legs.

How to fold
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1まい目:三角に折る
Sheet 1: Fold in half to make a triangle.
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さらに半分の三角に折る
Fold in half again.
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うらがえす
Turn it over.
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こちらも袋を開いて、四角につぶす(正方基本形)
Squash this side into a square, too. This is the preliminary base.
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下のふちを、まん中の線に合わせて折りすじをつける
Fold the lower edges to the center line and unfold.
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上の三角を折って、折りすじをつける
Fold the top down and unfold.
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1まいめを下から持ち上げて、ふちを折りすじで内側へ(花弁折り)
Lift the bottom corner of the top layer and fold the sides in along the creases (petal fold).
上の折りすじが「ちょうつがい」。左右のふちが まん中で ぴたりと合うように、ゆっくり持ち上げます。
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うらがえす
Turn it over.
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こちらも、下のふちをまん中に合わせて折りすじをつける
Fold the lower edges to the center line and unfold.
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こちらも花弁折り(鶴の基本形)
Petal fold this side, too. This is the bird base.
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下のふちを、まん中の線に合わせて折って、うらがえす
Fold the lower edges to the center line, then turn it over.
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こちらも、下のふちをまん中の線に合わせて折る
Fold the lower edges to the center line on this side, too.
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左下の先を、中わり折りで前へ(首)
Inside reverse fold the lower left point forward to make the neck.
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右下の先を、中わり折りでうしろへ(しっぽ)
Inside reverse fold the lower right point back to make the tail.
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首の先を中わり折りして、頭をつくる
Inside reverse fold the tip of the neck to make the head.
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頭の先を、中わり折りで中へ入れる(鼻先)
Inside reverse fold the tip of the head inside to make a blunt snout.
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しっぽを段折りして、少し下へ曲げる
Crimp the tail to bend it down a little.
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しっぽの先を中わり折りで上へ返す(とげ)
Inside reverse fold the tip of the tail back up to make the spikes.
先をしっぽの中へ返すと、しっぽの上から、とげが出ます。
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2まい目(小さい紙):三角に折る
Sheet 2 (smaller sheet): Fold in half to make a triangle.
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さらに半分の三角に折る
Fold in half again.
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うらがえす
Turn it over.
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こちらも袋を開いて、四角につぶす(正方基本形)
Squash this side into a square, too. This is the preliminary base.
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下のふちを、まん中の線に合わせて折りすじをつける
Fold the lower edges to the center line and unfold.
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上の三角を折って、折りすじをつける
Fold the top down and unfold.
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1まいめを下から持ち上げて、ふちを折りすじで内側へ(花弁折り)
Lift the bottom corner of the top layer and fold the sides in along the creases (petal fold).
上の折りすじが「ちょうつがい」。左右のふちが まん中で ぴたりと合うように、ゆっくり持ち上げます。
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うらがえす
Turn it over.
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こちらも、下のふちをまん中に合わせて折りすじをつける
Fold the lower edges to the center line and unfold.
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こちらも花弁折り(鶴の基本形)
Petal fold this side, too. This is the bird base.
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下のふちを、まん中の線に合わせて折る
Fold the lower edges to the center line.
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うらがえす
Turn it over.
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下のふちをまん中の線に合わせて折る。上の1まいの上のふちも、まん中の線に合わせて折る
Fold the lower edges to the center line. Fold the upper edges of the top layer to the center line, too.
上の1まいは、あとで前足になります。細くしておくと、すらりとした足になります。
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うらがえす
Turn it over.
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左半分をうしろへ、半分に折る(山折り)
Mountain fold in half, folding the left half behind.
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横向きにして、うらがえす。とがった先が左右にくるように置く
Turn it sideways and turn it over, so the points face left and right.
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下の角を、内側へ折りこむ(中わり折り)
Fold the bottom corner up inside (inside reverse fold).
おなかになるところです。角を内側へおしこんで、まっすぐにします。
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左の先を、中わり折りで下へ(前足)
Inside reverse fold the left point down to make the front legs.
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右の先を、中わり折りで下へ(後ろ足)
Inside reverse fold the right point down to make the back legs.
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足の先を、中わり折りで前へ(足先)
Inside reverse fold the tips of the legs forward to make the feet.
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足のついた2まい目を、1まい目のおなかの下にさしこむ
Slide the legs (sheet 2) under the belly of sheet 1.
2まい目の背中を、1まい目の胴の下の すきまに さしこみます。のりで とめてもOK。
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できあがり!足を少し開いて立たせたら、ステゴサウルスのできあがり!
Finished! Open the legs a little so it stands. Your Stegosaurus is finished!
Fun fact
ステゴサウルスは、およそ1億5000万年前にいた、草を食べる恐竜です。背中に大きな板がならび、しっぽの先には4本のとげがありました。体は大きいのに、頭はとても小さかったそうです。
Stegosaurus was a plant-eating dinosaur that lived about 150 million years ago. It had big plates along its back and four spikes at the end of its tail. Its body was huge, but its head was very small.
Origami English in this model
❓ FAQ
- What age is this origami Stegosaurus for?
- About Age 10+. It is rated “Challenge” (level 4 of 5), with 45 steps, and takes about 60 minutes.
- What paper do I need?
- 2 sheets of origami paper (15 cm and a slightly smaller 12 cm sheet) No scissors or glue are needed.
- What is it called in Japanese?
- In Japanese it is “ステゴサウルス”. The word origami (折り紙) itself means “folding paper”: ori = fold, kami = paper.
- Can I print the instructions?
- Yes. “Print the diagram” puts every step on one page (or a PDF), and the practice sheet has the crease lines printed on the paper. Free for home and classroom use.







