To provide a foul ball recovery mechanism that has a relatively simple constitution and can prevent a ball jam within a foul ball recovery passage.

The foul ball recovery mechanism includes: a passage formation member 51 that is provided detachably with respect to a housing frame 9 at an upper part of a game ball-shooting device 30 in the housing frame 9 and forms a shooting passage 58 for guiding a game ball shot from the game ball-shooting device 30 to a game board and the foul ball recovery passage 60 for recovering foul balls returning without reaching a game area; a foul ball discharge passage that is provided in the housing frame 9 and is connected to the foul ball recovery passage 60 for discharging foul balls to a lower ball plate.