Half bearing

A half bearing comprising:

• a bearing body that has a semi-cylindrical shape and has an inner circumferential surface that slides against a counterpart shaft;
• a first groove that is formed in the inner circumferential surface so as to extend in a circumferential direction of the inner circumferential surface;
• and
• a second groove that is formed in the inner circumferential surface so as to extend in the circumferential direction,
• wherein, in a cross section that is parallel with the circumferential direction and passes through the first groove, of the bearing body, an angle θ satisfies 90°≤θ≤105°, where the angle θ is formed by:
• a line that connects the inner circumferential surface side end of a mating surface that is located on a downstream side in a rotational direction of the counterpart shaft, with the center point of a circular arc that constitutes an outer circumferential surface;
• and a line that connects an end of the first groove in the circumferential direction, on the upstream side in the rotational direction of the counterpart shaft, with the center point,
• the first groove is formed at a position that is further on an edge side relative to an intermediate position between a central position in the axial direction and an edge of the inner circumferential surface, and
• the second groove is formed at a position that is further on another edge side relative to the intermediate position between the central position in the axial direction and another edge of the inner circumferential surface.