In a gear main body (1), a mouth opening portion (6) through which a mouth portion can be seen is formed in addition to and separately from an eye opening portion (5) through which both eyes can be seen. A part above the eye opening portion (5) covers a forehead portion, a part between the eye opening portion (5) and the mouth opening portion (6) covers cheek portions and a nose portion, and a part below the mouth opening portion (6) covers a lower jaw portion. A surface-side skin material (2) and a back-face-side skin material (3) are split in a vertical direction between the eye opening portion (5) and the mouth opening portion (6) to form a gap (9). At this gap (9), end portions facing each other at the gap (9) are connected by connecting means in such a manner that left and right spaces between the surface-side skin material (2) and the back-face-side skin material (3) communicate with each other. A shock absorbing material (4) is filled also in the communicating space at the gap (9).