To provide a cutting device for a sheet like recording medium capable of stably and adequately cutting the recording medium for a long time period even when a tip of a blade has a little wear or crack.

An image forming apparatus comprises a conveyance process section 10 for conveying a sheet-like recording medium and a printing process section 20 for performing the printing on the recording medium M conveyed by the conveyance process section 10. The cutting device of the sheet-like recording medium M that cuts the recording medium M printed by the printing process section 20 along the width direction thereof is attached to the image forming apparatus. The cutting device has a movement mechanism for moving a blade body 25 held by a holding section 26 along the width direction of the recording medium M and a switching mechanism 27 for switching the position of the blade body 25 between a cutting position for cutting the recording medium M and a retracting position for retracting from the cutting position.