Abstract: A coin deposit apparatus arranged for mounting onto a coin receiving plate of a slot machine includes a housing, having a semi-cylindrical lower magazine arranged to accommodate a row of coins thereon, with a semi-cylindrical lid mounted upon the coins to enclose the coins, with the lid projecting beyond a forward end of the lower magazine for mounting upon the coin receiving plate of the slot machine. A piston cooperates with a trigger member to project the piston into engagement with the coins and direct the coins forwardly through spaced springs for projection into the coin receiving plate.