1. An image forming apparatus for forming plural images from a single latent image formed on a latent image bearing member, comprising: a latent image bearing member; means for forming a latent image on said latent image bearing member; means for forming images on other members by means of said latent image formed on said latent image bearing member; and means for measuring a period of interruption of the formation of plural images on said other members; and means for controlling the remaining image formations, after said interruption, to be conducted with or without reformation of a new latent image on said latent image bearing member depending respectively on whether or not the period measured by said period measuring means exceeds a predetermined time limit of duration of said latent image.