POWER TRANSMISSION DEVICE

To provide a power transmission device that is equipped with an interrupter capable of properly switching a state in which rotators can integrally rotate and a state in which those can relatively rotate.SOLUTION: A transmission T is equipped with a first driven gear 184, a second shaft 182, a first interrupting mechanism 210, and a unit case 250 storing those. The first interrupting mechanism 210 is equipped with a roller 281 disposed between the first driven gear 184 and the second shaft 182, an operation rod 241 that operates the roller 281 to be in an engaging state in which the first driven gear 184 and the second shaft 182 can integrally rotate and in a non-engaging state in which the first driven gear 184 and the second shaft 182 can relatively rotate, and a first control unit 301 that controls the operation rod 241.SELECTED DRAWING: Figure 20 【課題】回転体同士が一体回転可能な状態と相対回転可能な状態とを適切に切り替え可能な断続装置を備える動力伝達装置を提供する。【解決手段】変速機Ｔは、第１従動ギヤ１８４と、第２シャフト１８２と、第１断続機構２１０と、これらを収容するユニットケース２５０と、を備える。第１断続機構２１０は、第１従動ギヤ１８４と第２シャフト１８２との間に配置されるローラ２８１と、ローラ２８１を第１従動ギヤ１８４と第２シャフト１８２とが一体回転可能な係合状態と、ローラ２８１を第１従動ギヤ１８４と第２シャフト１８２とが相対回転可能な非係合状態と、に操作する操作ロッド２４１と、操作ロッド２４１を制御する第１制御部３０１と、を備える。【選択図】図２０