To provide a drive unit for a toy which can improve the attractiveness of a stuffed toy.

This drive unit 1a for a toy is to built in the main body of a stuffed toy and is equipped with a first moving body 5a in a shape corresponding to a moving part of the main body of stuffed toy. The first moving body 5a is moved by drive force by a power spring 51 of the drive means 22. The drive means 22 is equipped with a first acceleration gear transmission mechanism 103 and a second acceleration gear transmission mechanism 104 positioned downstream the transmission direction of the first acceleration gear transmission mechanism 103. The second acceleration gear transmission mechanism 104 has a fifth shaft 70 of a weight attaching shaft. A weight body 104 to lower the rotation speed of a second shaft 67 is equipped on the fifth shaft 70.