The present invention addresses the problem of providing an ink-jet printer capable of reducing lines in a sub-scanning direction in a printing result to thereby perform good printing. As a means for solving the problem, an ink-jet printer (1) is provided with: a motor (70) which generates driving force for moving an ink-jet head (12) that moves in a main scanning direction with respect to a printing object (50); a motor pulley (74) which is rotated by the driving force generated by the motor (70); a first belt (84) which is wound around the motor pulley (74) and transmits the driving force from the motor pulley (74) side to the ink-jet head (12) side; and a speed reduction pulley (80) around which the first belt (84) is wound and which is rotated by the driving force transmitted from the first belt (84), and motor-side teeth (76) of the motor pulley (74) and belt-side teeth (86) of the first belt (84) and/or speed reduction-side teeth (82) of the speed reduction pulley (80) and the belt-side teeth (86) of the first belt (84) is a combination in which spur gear teeth and helical gear teeth mesh with each other.
