A hermetic compressor, comprising: a compression unit that is provided at an inner space of a shell and forms a compression chamber while being operated by a driving force of a motor unit to compress a refrigerant; a crankshaft that connects the motor unit and the compression unit; and a bearing member provided with a shaft receiving hole so as to support the crankshaft in a radial direction, wherein an oil supply groove that defines a part of an oil supply passage is formed on an outer circumferential surface of the crankshaft, and wherein the oil supply groove is provided between the outer circumferential surface of the crankshaft and an inner circumferential surface of the bearing member facing the outer circumferential surface of the crankshaft, wherein the crankshaft is provided with a lower bearing portion that forms a first bearing surface with the bearing member and an upper bearing portion that forms a second bearing surface with the bearing member, and the lower bearing portion and the upper bearing portion are spaced apart in an axial direction, wherein parts of the oil supply groove are formed on an outer circumferential surface of the lower bearing portion and an outer circumferential surface of the upper bearing portion, respectively, and characterized in that an inclination angle (α1) of the oil supply groove formed on the lower bearing portion is greater than an inclination angle (α2) of the oil supply groove formed on the upper bearing portion, and the oil supply groove formed on the lower bearing portion and the oil supply groove formed on the upper bearing portion are respectively located out of pressed regions generated between the outer circumferential surface of the crankshaft and the inner circumferential surface of the bearing member that are in close contact with each other when the crankshaft rotates, wherein the pressed regions refer to bearing surfaces on which oil film thickness is narrowed below a certain level by a compression load and an inertial load generated in accordance with rotation of the crankshaft and wherein the inclination angle is defined as an angle at which the oil supply groove is inclined in a direction orthogonal to the axial direction. a compression unit that is provided at an inner space of a shell and forms a compression chamber while being operated by a driving force of a motor unit to compress a refrigerant; a crankshaft that connects the motor unit and the compression unit; and a bearing member provided with a shaft receiving hole so as to support the crankshaft in a radial direction, wherein an oil supply groove that defines a part of an oil supply passage is formed on an outer circumferential surface of the crankshaft, and wherein the oil supply groove is provided between the outer circumferential surface of the crankshaft and an inner circumferential surface of the bearing member facing the outer circumferential surface of the crankshaft, wherein the crankshaft is provided with a lower bearing portion that forms a first bearing surface with the bearing member and an upper bearing portion that forms a second bearing surface with the bearing member, and the lower bearing portion and the upper bearing portion are spaced apart in an axial direction, wherein parts of the oil supply groove are formed on an outer circumferential surface of the lower bearing portion and an outer circumferential surface of the upper bearing portion, respectively, and characterized in that an inclination angle (α1) of the oil supply groove formed on the lower bearing portion is greater than an inclination angle (α2) of the oil supply groove formed on the upper bearing portion, and the oil supply groove formed on the lower bearing portion and the oil supply groove formed on the upper bearing portion are respectively located out of pressed regions generated between the outer circumferential surface of the crankshaft and the inner circumferential surface of the bearing member that are in close contact with each other when the crankshaft rotates, wherein the pressed regions refer to bearing surfaces on which oil film thickness is narrowed below a certain level by a compression load and an inertial load generated in accordance with rotation of the crankshaft and wherein the inclination angle is defined as an angle at which the oil supply groove is inclined in a direction orthogonal to the axial direction.