Fishing spinning reel that can securely prevent penetration of seawater and foreign substances into a bearing, having a sufficient durability for use in harsh environments, a fine rotational performance, and easy handling and maintenance, comprising a magnetic fluid sealed bearing (25) in which a magnetic fluid seal is provided integrally with a bearing, and a line roller (23) is rotatably supported on a supporting shaft (17) through the magnetic fluid sealed bearing (25). A magnetic fluid seal (40) is provided on both sides of a bearing body of the bearing (25). Moreover, a magnetic fluid (45) of the magnetic fluid seal (40) includes an outer ring magnet fluid (45b) retained between an outer ring (30b) and a magnet (42), and an inner ring magnetic fluid (45a) retained between the inner ring (30a) and a retaining plate (44).
