Inkjet image forming apparatus

An inkjet image forming apparatus includes an inkjet head including a nozzle portion having a length in a main scanning direction that is at least equal to a width of a sheet of paper, a platen to move between a printing position where the platen faces the nozzle portion and supports a rear surface of the paper, and a maintenance position spaced-apart from the printing position in a sub-scanning direction, a wiping unit including a wiper to clean the nozzle portion, and a link arm having a first end portion that is rotatably connected to the wiping unit, and a second end portion that is rotatably connected to the platen. A first angle formed by a first line that connects the wiper to the first end portion and a second line that connects the first end portion and the second end portion when the platen is located at the printing position is smaller than a second angle between the first line and the second line when the platen is located at the maintenance position.