To enhance throughput by locating a print starting position adjusting region closer to the nonprinting side than an accelerating/decelerating region thereby eliminating useless moving region of carriage at the time of printing.

A print control means executes printing of one line by delivering a data to first and second recording heads 8, 9 mounted side by side in the moving direction of carriage. When the carriage passes through a final dot printing position L after finishing printing of one line, a carriage control means decelerates a carriage drive motor in an accelerating/decelerating region and stops the motor at a position shifted to the left from the final dot printing position L by an amount corresponding to the acceleration/deceleration stroke Sa and the maximum gap adjusting length. Consequently, the moving stroke can be shortened by ΔS1 as compared with the carriage moving region S0 at the time of printing a serial printer.