A bill identification and counting machine in which a plurality of bills with different sizes are filled between side hopper members and delivered in order into a carrying route by a supply mechanism. The supply mechanism comprises a plurality of rollers disposed in a bilaterally symmetrical state. The plurality of rollers are disposed so that, when a distance between the side hopper members is adjusted according to the longitudinal dimension of a bill with the maximum dimension in the longitudinal direction and a bill with the minimum dimension in the longitudinal direction is disposed at a position where the bill is brought into contact with one of the side hopper members, at least a part of the rollers installed on the opposite side of the side hopper member where the bill is brought into contact therewith is brought into contact with the bill. Also, the supply mechanism comprises a guide member guiding the bill to the inlet of the carrying route. The guide member comprises a guide face formed so that the opening area thereof is gradually increased toward the both ends thereof, and the guide face is formed so that the opening area thereof is converged to zero from an insert port toward the inlet of the carrying route.