A coin storing apparatus with overflow chute apparatus is supplied with coins from a slot-shaped replenishing port to a coin storing portion and stores the coins in piles in the coin storing portion. The coins overflow via a downward overflow chute having a width equal to or larger than a diameter of a coin, when an amount of the coins in the coin storing portion reaches a predetermined amount. A downward slope wider than the diameter of the coin is disposed below the replenishing port. A guide rail is continuous with the downward slope and has a predetermined width narrower than a radius of the coin. A downward overflow chute extends at a predetermined angle to the guide rail and has a width equal to or larger than the diameter of the coin and is provided below the guide rail. The guide rail is disposed on the downward slope adjacent to a downstream side of the overflow chute. A coin dropped from the replenishing port comes in face contact with the downward slope, and then a lower face of the coin on a downstream side of the overflow chute slides on the guide rail to reach the storing portion, and the coins accumulated in the storing portion can be moved to the overflow chute.