The present disclosure relates to the technical field of optical lenses and discloses a lens module. The lens module includes: a lens; a lens barrel receiving the lens; a lens seat receiving the lens barrel; and a pressure-proof part having a receiving space. The lens barrel is installed into the lens seat from an object side of the lens seat to form an imaging body. The pressure-proof part includes a top wall forming a through hole and disposed at an object side of the lens barrel and a side wall extending from an edge of the top wall facing away from an optical axis while being bent towards an image side, the top wall and the side wall forming the receiving space. The receiving space receives at least a portion of the imaging body.