An image forming device includes a transportation path, a transportation roller and a foreign particle collecting mechanism. The transportation path extends approximately upward from a paper feed cassette which sequentially feeds paper for printing an image. The transportation path transports the paper from the paper feed cassette via an image forming unit, which prints a desired image onto the paper, to a paper discharge tray. The transportation roller is provided at the transportation path upstream of the image forming unit. The foreign particle collecting mechanism removes a foreign particle adhered to a roller surface of the transportation roller. The paper feed cassette includes a container for receiving a foreign particle dropped off from the foreign particle collecting mechanism.