Imaging lens capable of blocking stray light

An imaging lens comprising:

• a lens barrel including a base wall formed with a light incident hole at an optical axis of the imaging lens and disposed proximate to an object side, and a surrounding wall that extends from an outer periphery of the base wall toward an image side, and that cooperates with the base wall to define a receiving space;
• an imaging unit disposed in the receiving space of the lens barrel, and including a plurality of imaging components arranged along the optical axis in an order, each of the imaging components having an annular front contact surface facing toward the object side and an annular back contact surface facing toward the image side;
• and
• a light shielding unit disposed in between an adjacent pair of the imaging components and clamped between the annular back contact surface of one of the imaging components in the adjacent pair and the annular front contact surface of the other one of the imaging components in the adjacent pair, the light shielding unit including an annular retaining portion clamped between the adjacent pair of the imaging components, an object-side protruding portion slantingly extending from an object-side inner peripheral edge of the retaining portion towards the optical axis and terminating at a first edge, and an image-side protruding portion slantingly extending from an image-side inner peripheral edge of the retaining portion towards the optical axis and terminating at a second edge.