A drive gear (11, 131) for a spinning reel (100, 200) is meshed with a pinion gear (12, 132). The drive gear (11, 131) has a gear body (11a, 131a), a plurality of drive gear teeth (11b, 131b) and a waveform regulating part (16, 119). The gear body (11a, 131a) is mounted onto a drive shaft (10, 130). The plurality of drive gear teeth (11b, 131b) are disposed on an outer peripheral side of the gear body (11a, 131a), are circumferentially disposed at intervals and are meshed with the pinion gear (12, 132). The waveform regulating part (16, 119) is disposed on at least a part of the plural drive gear teeth (11b, 131b), and is configured to regulate a waveform (WS) of a vibration produced in meshing in an irregular pattern. The waveform regulating part (16, 119) is configured to regulate the waveform (WS) in the irregular pattern by having at least one feature of the drive gear teeth (11b, 131b) be different from the rest of the drive gear teeth (11b, 131b), the at least one feature being selected from the group consisting of a pressure angle (PA), a pitch (PE), a torsion angle (TA), a tooth profile shape (TS) and a tooth trace shape (TLS).
