To provide a frame body for a game machine capable of preventing a projection from disturbing crossing and stacking of outer frames, and hence capable of stacking many outer frames horizontally or with a desired tilt.

A width correcting section 12B is formed outside a body 12A of a first side frame plate 12 of each outer frame 11 for the game machine in the vertical direction of a body 12A. The width correcting section 12B is provided with a projection 12C projecting forward than the front surface of the outer frame 11. Both side frame plates 12 and 13 on the back surface side of the outer frame 11 are provided with respective notch grooves 23 and 24. The outer frames 11 are crossed and stacked vertically with the front surface directed upward, the projection 12C of the width correcting section 12B of the outer frame 11 on the lower stage side is disposed in both notch grooves 23 and 24 of the outer frame 11 on the upper stage side.