To provide a printer which is as simple as an electrophotographic system printer, produces "a plate" at a high speed on demand, and has image quality equivalent to that of offset printing; and a printing method.

The printer using a rewritable plate has a first plate forming body which forms the rewritable plate, a latent image forming means for the first plate forming body, a protrusion forming means which makes ink-repelling particles adhere selectively to a part wherein the latent image on the surface of the first plate forming body is formed, a second plate forming body which accepts/holds the ink repelling particles adhered to the surface of the first plate forming body by recesses formed in the surface, a pressing means which pushes the ink repelling particles into the recesses, and a recording material supply means for supplying a recording material onto the surface of the second plate forming body. The surface of the ink repelling particle has a property to repel the recording material, and the surfaces of the plate forming bodies are made to have a property not to repel the recording material.