An image forming apparatus is provided which can detect abnormality in a conveyance system of a carriage by a change in posture of the carriage. The image forming apparatus includes an image forming device that forms an image onto a recording medium by moving a carriage which mounts a recording head thereon, an angular speed detection device that detects an angular speed around a predetermined axis of the carriage, and a abnormality determination device that determines abnormality in a conveyance system that moves the carriage based on whether the angular speed detected by the angular detection device when the carriage is moved exceeds a predetermined abnormality determination value.