To provide a printer in which quality management of record format can be facilitated.

The printer comprises a means for recording on a recording material by a test pattern recording means having density variation by more than one times in the subscanning direction at the same position in the main scanning direction (vice versa), a means for measuring a test pattern in at least one of the main scanning direction and subscanning direction, and a processing means for analyzing the measurements of the measuring means and informing the fact that the interval of density variation is appropriate or adjusting the recording control parameters and informing the fact that the interval is inappropriate if the interval of density variation is inappropriate.