1. An image forming apparatus comprising: a plurality of image carriers; a plurality of transfer means, each of which is provided corresponding to each of said plurality of image carriers and contacted under pressure with each of said plurality of image carriers through an intermediate transfer body or recording material by the application of pressure; a plurality of driving means for driving said plurality of image carriers to rotate; and control means for controlling said driving means, wherein said control means changes a control method for said driving means according to the kind of image so that said transfer means will be selectively operated according to the kind of image.