DOUBLE-ROW ROLLER BEARING

Provided is a double-row roller bearing, which is capable of suppressing a frictional force from being increased due to variation in force of press contact between outer and inner rings (1, 2) and rollers (3) to enable smoother relative rotational movement between the outer ring (1) and the inner ring (2), and is also suitable for downsizing and higher in versatility. The double-row roller bearing includes: the inner ring (2); the outer ring (1); and the plurality of rollers (3) arranged between the inner ring (2) and the outer ring (1). On an inner peripheral surface (11) of the outer ring (1), a pair of lateral protruding portions (12) continuous along a circumferential direction are formed at an interval in a direction of a rotation axis. On an outer peripheral surface (21) of the inner ring (2), an intermediate protruding portion (22) continuous along the circumferential direction is formed so as to be positioned between the lateral protruding portions (12). The pair of lateral protruding portions (12) and the intermediate protruding portion (22) define a pair of roller rolling passages (30) between the outer ring (1) and the inner ring (2). In each of the pair of roller rolling passages (30), rollers (3a) each having a turning axis perpendicular to the rotation axis of the outer ring (1) and the inner ring (2), and rollers (3b) each having a turning axis parallel to the rotation axis of the outer ring (1) and the inner ring (2) are arranged in a mixed manner.