A color image processing device includes an acquiring unit that acquires sample values of an original document at a prescribed cycle from a plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another, a storage unit having a capacity that stores the sample values for a prescribed number of samplings and a transferring unit that transfers relatively the original document and sampling positions of the line sensors. A correction unit corrects by carrying out a gap correction process for correcting a gap of the sampling positions of each of the line sensors in accordance with the sample values stored in the storage unit and an instructing unit instructs the transferring unit. In accordance with a rate of magnification for scanning the original document and the capacity of the storage unit, the instructing unit determines whether the gap correction process according to the rate of magnification can be carried out. When the gap correction process can be carried out, the instructing unit instructs the transferring unit to transfer at a correction speed so that a sample value to be used for the gap correction process can be acquired.