1. An image forming apparatus provided with a transfer unit and a record head having a plurality of record elements arranged thereon for recording dots on a recording material, the apparatus forming an image on the recording material based on a transfer operation for making the transfer unit transfer the recording material and a move operation for making the record head travel to a direction orthogonal to a transfer direction of the recording material, the image forming apparatus comprising: a record control unit that controls the transfer unit and record head to record on the recording material a plurality of test pattern images arranged side by side in a moving direction of the record head, each of the test pattern image being composed of a first pattern image and a second pattern image, wherein an amount of the recording material transferred by the transfer unit between recordings of the first pattern image and the second pattern image differs in each of the plurality of test pattern images.