Patent ID: 8545007

Claim:
An image forming apparatus comprising: a conveyance drum which has a round cylindrical shape including an outer circumferential surface having a medium holding section, and rotates in a prescribed direction while holding a medium in tight contact on the medium holding section so as to convey the medium in a circumferential direction; a pressing device which presses the medium against the medium holding section so as to establish tight contact between the medium and the medium holding section, when causing the medium to make tight contact with the medium holding section; a holding force generating device which generates a holding force that holds the medium on the medium holding section; and a liquid ejection head which ejects a liquid onto the medium held on the medium holding section, wherein: the conveyance drum has a level difference section which is provided on at least one side, in an axial direction of the conveyance drum, with respect to a central portion in the axial direction of the conveyance drum, the level difference section having a larger diameter than the central portion so as to project beyond an outer circumferential surface of the central portion; the level difference section has a length, in the circumferential direction, smaller than a length of the medium holding section in the circumferential direction; the level difference section is provided in the medium holding section of the conveyance drum: the conveyance drum includes a fixing device which fixes a leading end of the: medium in a conveyance direction; and the fixing device is provided in a recess section in the outer circumference of the conveyance drum; wherein the thickness of the level difference section is not less than 50 μm and not more than 500 μm; and wherein the level difference section is provided with suction holes.