Image forming apparatus

An image forming apparatus, comprising:

• a first photosensitive body;
• a second photosensitive body;
• a first developing portion configured to develop an electrostatic latent image formed on the first photosensitive body with toner;
• a second developing portion configured to develop an electrostatic latent image formed on the second photosensitive body with toner;
• and
• an optical scanning device disposed below the first photosensitive body, the second photosensitive body, the first developing portion and the second developing portion in a vertical direction,
• wherein the optical scanning device comprises:
• a rotary polygon mirror configured to deflect a first laser beam and a second laser beam such that the first laser beam scans the first photosensitive body and the second laser beam scans the second photosensitive body;
• a housing in which the rotary polygon mirror is accommodated, a first opening portion through which the first laser beam passes from an inside of the housing to an outside of the housing and a second opening portion through which the second laser beam passes from the inside of the housing to the outside of the housing being formed on the housing, the first opening portion being configured to be long in a scanning direction of the first laser beam, the second opening portion being configured to be long in a scanning direction of the second laser beam;
• a first transmissive member through which the first laser beam transmits, the first transmissive member being configured to close the first opening portion;
• a second transmissive member through which the second laser beam transmits, the second transmissive member being configured to close the second opening portion;
• a first cleaning member configured to be in contact with a surface of the first transmissive member which surface faces the outside of the housing in order to clean the surface of the first transmissive member;
• a second cleaning member configured to be in contact with a surface of the second transmissive member which surface faces the outside of the housing in order to clean the surface of the second transmissive member;
• a holding member configured to integrally hold the first cleaning member and the second cleaning member, the holding member having flexibility;
• a moving unit configured to move the holding member such that the first cleaning member and the second cleaning member move in a first direction that is a longitudinal direction of the first transmissive member and the second transmissive member;
• a first guide portion configured to guide a movement of the holding member, the first guide portion extending in the first direction, an end portion side of the holding member in a second direction that crosses the first direction and the vertical direction being configured to engage with the first guide portion;
• and
• a second guide portion configured to guide a movement of the holding member, the second guide portion extending in the first direction, another end portion side of the holding member in the second direction being configured to engage with the second guide portion, and
• wherein a first protruding portion that protrudes upward from an upper surface of the holding member is provided on the holding member between the first cleaning member and the second cleaning member in the second direction, and a second protruding portion that protrudes upward from the upper surface of the holding member is provided on the holding member at a position closer to an end portion of the holding member in the second direction than the second cleaning member, the first protruding portion and second protruding portion being for bending the holding member in the second direction.