An imaging lens comprising in order from an object side: a front group (G1) having negative power; an aperture stop (ST); and a rear group (G2) having positive power, wherein in the front group (G1), a first lens surface (S1) closest to the object side has a convex shape toward the object side, wherein in the rear group (G2), a second lens surface (S6) closest to the object side has a convex shape toward the object side, a third lens surface closest to an image side has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat (IR), wherein a curvature radius of the second lens surface (S6) is represented by Rr, a curvature radius of the third lens surface (S12) is represented by Re, a distance from the second lens surface (S6) to the third lens surface on an optical axis (Z1) is represented by Da, and the following condition is satisfied: 1.6 < Rr + Re / Da < 2.3 and wherein (i) the front group (G1) includes a concave meniscus-shaped first lens (L1) having the first lens surface (S1) and a concave meniscus-shaped second lens (L2) in order from the object side, and the second lens (L2) is arranged with its convex surface facing the image side and/or (ii) the rear group (G2) includes a third lens (L3) having the second lens surface (S6), a fourth lens (L4), and a cemented lens (CL) in order from the object side, and the third lens (L3), the fourth lens (L4), and the cemented lens (CL) all have positive power. a front group (G1) having negative power; an aperture stop (ST); and a rear group (G2) having positive power, wherein in the front group (G1), a first lens surface (S1) closest to the object side has a convex shape toward the object side, wherein in the rear group (G2), a second lens surface (S6) closest to the object side has a convex shape toward the object side, a third lens surface closest to an image side has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat (IR), wherein a curvature radius of the second lens surface (S6) is represented by Rr, a curvature radius of the third lens surface (S12) is represented by Re, a distance from the second lens surface (S6) to the third lens surface on an optical axis (Z1) is represented by Da, and the following condition is satisfied: 1.6 < Rr + Re / Da < 2.3 and wherein (i) the front group (G1) includes a concave meniscus-shaped first lens (L1) having the first lens surface (S1) and a concave meniscus-shaped second lens (L2) in order from the object side, and the second lens (L2) is arranged with its convex surface facing the image side and/or (ii) the rear group (G2) includes a third lens (L3) having the second lens surface (S6), a fourth lens (L4), and a cemented lens (CL) in order from the object side, and the third lens (L3), the fourth lens (L4), and the cemented lens (CL) all have positive power. (i) the front group (G1) includes a concave meniscus-shaped first lens (L1) having the first lens surface (S1) and a concave meniscus-shaped second lens (L2) in order from the object side, and the second lens (L2) is arranged with its convex surface facing the image side and/or (ii) the rear group (G2) includes a third lens (L3) having the second lens surface (S6), a fourth lens (L4), and a cemented lens (CL) in order from the object side, and the third lens (L3), the fourth lens (L4), and the cemented lens (CL) all have positive power. <EOS>