PROBLEM TO BE SOLVED: To attain an endoscope objective lens that has excellent optical performance even with a small diameter, and to attain an endoscope that includes the endoscope objective lens.SOLUTION: An endoscope objective lens substantially comprises, in order from an object side,: a first lens group G1 with a negative refractive power a diaphragm and a second lens group G2 with a positive refractive power. The first lens group G1 is composed of one piece of a negative lens, while the second lens group G2 is composed of two pieces of lenses or less. Let a focal length of the first lens group be denoted as f1 and a focal length of an entire system be denoted as f, the endoscope objective lens satisfies a conditional expression (1):-1.0
