An imaging lens for adjusting a position of an adjusting lens to be carried out easily and which has an improved impact resistance. The imaging lens includes a lens frame for supporting a lens serving as an adjusting lens and a support frame for supporting the lens frame. A contact section for support frame adjustment operable to come into contact with the lens frame is arranged in the support frame. A contact section for lens frame adjustment operable to come into contact with the support frame is arranged in the lens frame. The lens frame is configured such that the fastening force generated between the lens frame and the support frame can be applied vertical with respect to the contact section for support frame adjustment in a state of the contact section for lens frame adjustment held in contact with the contact section for support frame adjustment.