To provide a game machine, simplifying the knock-down work and replacement work of components to reduce the cost required for the works.

A pair of engagement projections 5b, 5b exposed to the backside of a winning ball collection cover 11 from through-holes 11c, 11c are clamped, with the winning ball collection cover 11 attached to the backside of a game board, to cause bending deformation of the respective arm parts 5a, 5a in the directions opposite to each other. By bending deformation of the respective arm parts 5a, 5b, the engagement projections 5b, 5b are released from opening edges of the through-holes 11c, 11c, the engagement state of the engagement projections 5b, 5b and the through-holes 11c, 11c is released to disengage a winning device 1 from the winning ball collection cover 11. In such a state, when the engagement projections 5b, 5b are pushed toward the interiors of the through-holes 11c, 11c, the winning device 1 is pushed toward the game area 10a surface side from the interior of a fitting hole 10b so that the winning device 1 can be removed from the fitting hole 10b.