To provide the coin input port structure of an automatic vending machine for allowing a customer to input a coin without any difficulty to a slit-shaped input port formed in a vertical direction.

This coin input port structure is provided with a coin rolling part 25 inclined so as to be made wider toward depth 30 of a coin input port to which a coin is inputted in a vertical direction, and formed so that a contact face on which the coin rolls can be made round, a coin sliding part 22 inclined toward the coin rolling part and the depth of the input port, a coin preventing wall 23 formed so as to be faced to the coin sliding part, and so as to be made round, and a coin regulating piece 24 formed at the depth side of the input port of the coin sliding part.