PURPOSE: To hold an upper and a lower chute, which guide a coin thrown in the coin throw-in slot in the front surface of an external door to a coin mech installed in an intermediate door and are divided into an external door side and an internal door side, in constant position relation at all times when the intermediate door is closed.

CONSTITUTION: This device is provided with a guide plate 41 which has its base end part fixed to the external door 2 and extends backward integrally with a throw-in slot 25 having the upper chute which has the coin throw-in slot 23 opened and communicates with the coin throw-in slot 23 and with a restriction plate 42 which has its base end fixed to an intermediate door support member and extends forward integrally with the intermediate door 3 which supports the lower chute 33; when the intermediate door 3 is closed, the restriction plate 42 is superposed on the guide plate 41 to restrict the downward slide of the lower chute 33 from the upper chute, and both the chutes are held in certain position relation.