Image forming apparatus

An image forming apparatus comprising:

• a rotatable image bearing member configured to bear a toner image;
• a blade member configured to collect a developer on the image bearing member, the blade member including a first side surface in contact with the image bearing member and a second side surface which is on a side opposite to the first side surface in a thickness direction of the blade member intersecting with a rotation direction of the image bearing member, wherein, in a state where the blade member is viewed from a direction orthogonal to the rotation direction of the image bearing member, a contact portion where the first side surface is in contact with the image bearing member is disposed upstream from a position where the blade member is fixed to a supporting member in the rotation direction;
• a sheet member configured to be in contact with the image bearing member at a position, in the rotation direction, upstream from a position where the blade member is in contact with the image bearing member, wherein, in a state where the sheet member is viewed from the direction orthogonal to the rotation direction, the sheet member is fixed at one end and is in contact with the image bearing member at another end serving as a free end;
• and
• an agitation member including a shaft portion disposed rotatably and a sheet portion that is mounted on the shaft portion and rotated with rotation of the shaft portion, the sheet portion being elastically deformable and being configured to come into contact with the second side surface,
• wherein, in a state where the sheet member is viewed from a rotation axis direction of the shaft portion which is orthogonal to the rotation direction, and when an imaginary line which connects a position of an end portion on a most upstream side of the second side surface in the rotation direction and an axial center position of the shaft portion is a first line, and an imaginary line which is orthogonal to the first line and passes through the position of the end portion on the most upstream side of the second side surface is a second line, the free end of the sheet member is disposed at a position closer to the blade member than a position where the second line intersects with an outer circumferential surface of the image bearing member.