To allow a user to easily and safely remove a recording material that is exfoliated from a cylinder by some chance and to prevent secondary defects due to a thing falling off from an upper part of the cylinder, by having the thing stop at the upper part of a cover.

This image recorder is provided with a cylinder that has an outer circumferential face of a substantially cylindrical shape and fixedly holds a recording material P, a cylinder-rotating means that rotates the cylinder around a cylinder axis of the cylindrical face substantially, an exposure head A that emits a recording light onto the recording material P to expose it and records an image on an image recording face of the recording material P fixedly supported onto the cylinder, by emitting the recording light from the exposure head A is provided with a cover 900 which covers the outer circumferential face of the cylinder and having a recording light emission port 900a and a material discharge port 900b consists of one or a plurality of members. A gap between the cover 900 and the cylinder is widened only in a specific direction, which is used for a save section of a jammed recording material.