PURPOSE: To provide a waste can rolling machine which is capable of continuously rolling waste cans and which is provided with a high operating efficiency and also compactness.

CONSTITUTION: A pair of main rollers 22R, 22L are placed side by side so as to be rotatable in the direction opposite to each other, and each main roller is provided with plural curved recessed parts 30 formed on the circumferential face. A waste can 2 is sandwiched between the pair of main rollers in pressurization and made into a flat rolled form in passing through the rollers. Preferably, a pair of auxiliary rollers 24R, 24L with plural projections 35 are arranged under the main rollers and rotated in the direction opposite to each other so that waste cans are further rolled completely. Thus, a continuous rolling of waste cans is made possible, and the rolling operation is efficient. Since the rolling is by torque, the driving force is reduced in comparison with reciprocating motion.