A unit configured to be detachable from an apparatus main body of an image forming apparatus , the unit comprising: a conveying member for conveying developer (T); a frame that stores the developer (T) and including: a first chamber that stores the conveying member , a second chamber , and a first opening which connects the first chamber and the second chamber , and through which the developer (T) conveyed from the first chamber to the second chamber is passed, characterized in that the frame is provided with a second opening which connects an interior of the second chamber and an exterior of the frame in an orthogonal direction that is orthogonal to a direction of a rotation axis line of the conveying member , the unit comprises a filter that allows passage of air and restricts passage of the developer (T), and the filter being fixed to the frame so as to cover the second opening , the conveying member is deformable such that the developer (T) is conveyed from the first chamber to the second chamber via the first opening by deformation of the conveying member being released, and the frame is displaceable with respect to the apparatus main body in a state where the unit is attached to the apparatus main body, such that the filter is displaced with respect to the apparatus main body. a conveying member for conveying developer (T); a frame that stores the developer (T) and including: a first chamber that stores the conveying member , a second chamber , and a first opening which connects the first chamber and the second chamber , and through which the developer (T) conveyed from the first chamber to the second chamber is passed, characterized in that the frame is provided with a second opening which connects an interior of the second chamber and an exterior of the frame in an orthogonal direction that is orthogonal to a direction of a rotation axis line of the conveying member , the unit comprises a filter that allows passage of air and restricts passage of the developer (T), and the filter being fixed to the frame so as to cover the second opening , the conveying member is deformable such that the developer (T) is conveyed from the first chamber to the second chamber via the first opening by deformation of the conveying member being released, and the frame is displaceable with respect to the apparatus main body in a state where the unit is attached to the apparatus main body, such that the filter is displaced with respect to the apparatus main body. a first chamber that stores the conveying member , a second chamber , and a first opening which connects the first chamber and the second chamber , and through which the developer (T) conveyed from the first chamber to the second chamber is passed, characterized in that the frame is provided with a second opening which connects an interior of the second chamber and an exterior of the frame in an orthogonal direction that is orthogonal to a direction of a rotation axis line of the conveying member , the unit comprises a filter that allows passage of air and restricts passage of the developer (T), and the filter being fixed to the frame so as to cover the second opening , the conveying member is deformable such that the developer (T) is conveyed from the first chamber to the second chamber via the first opening by deformation of the conveying member being released, and the frame is displaceable with respect to the apparatus main body in a state where the unit is attached to the apparatus main body, such that the filter is displaced with respect to the apparatus main body. <EOS>