In an image forming apparatus, a first deviation detection portion detects an amount of deviation of a sheet of paper in relation to a reference position of an edge of the sheet of paper. A control portion determines whether or not an amount of deviation detected by the first deviation detection portion exists within a moving adjustment range of a pair of registration rollers in the second control and performs a first control to correct the reference position of the edge of the sheet of gaper before the image is formed when the amount of deviation exceeds the moving adjustment range of the pair of registration rollers. A second deviation detection portion detects an amount of deviation of the sheet of paper just before the image is formed in relation to a reference position of the edge of the corrected sheet of paper.