A drive gear for a spinning reel is meshed with a pinion gear. The drive gear has a gear body, a plurality of drive gear teeth and a waveform regulating part. The gear body is mounted onto a drive shaft. The plurality of drive gear teeth are disposed on an outer peripheral side of the gear body, are circumferentially disposed at intervals and are meshed with the pinion gear. The waveform regulating part is disposed on at least a part of the plural drive gear teeth, and is configured to regulate a waveform of a vibration produced in meshing in an irregular pattern. The waveform regulating part is configured to regulate the waveform in the irregular pattern by having at least one feature of the drive gear teeth be different from the rest of the drive gear teeth, the at least one feature being selected from the group consisting of a pressure angle, a pitch, a torsion angle, a tooth profile shape and a tooth trace shape.﹝課題﹞進一步提高朝操作桿傳遞的釣魚用捲線器的旋轉感覺。﹝技術內容﹞紡車式捲線器(100)的驅動齒輪(11),是與小齒輪(12)嚙合。驅動齒輪(11),是具備齒輪本體(11a)及複數驅動齒輪齒(11b)及波形調整部(16)。齒輪本體(11a)是設於驅動軸(10)。複數驅動齒輪齒(11b),是在齒輪本體(11a)的外周側在圓周方向隔有間隔地設置,與小齒輪(12)嚙合。波形調整部(16),是設在複數驅動齒輪齒(11b)的至少一部分,使在嚙合發生的振動的波形(WS)成為不均一的方式調整。波形調整部(16),是在至少1個驅動齒輪齒(11b)及剩下的驅動齒輪齒(11b)之間,藉由使壓力角(PA)、間距(PE)、扭轉角(TA)、齒形的形狀(TS)、及齒交線的形狀(TLS)的至少其中任一相異,使波形(WS)成為不均一的方式調整。PE‧‧‧間距TA‧‧‧扭轉角TLS‧‧‧齒交線的形狀11‧‧‧驅動齒輪11d‧‧‧第1齒面11e‧‧‧第2齒面16‧‧‧波形調整部
