To prevent the rubbing of a recording medium and a recording head by suppressing the floating of the top end of the recording medium, even when ink jet recording is performed at the top end of the curled recording medium, in such a state that a margin is left.

The use range involved in recording of a nozzle arrangement range is set according to a margin amount, so that when the top end of the recording medium is located in a predetermined area from a position where recording is performed by the recording head where nozzles are arranged to a recording medium conveying means on the downstream side in the conveying direction of the recording medium, a first ink discharge operation is not performed.