The insertion device includes a first pivoting member which is provided in a state rotatable around a pivot shaft and which pulls the first linear portion by pivoting, a second pivoting member which pivots about the pivot shaft And a second rotating member provided in a possible state and pulling the second linear portion by rotating. The insertion device includes an operation unit that is operated by an electric driving force transmitted by the drive member being driven, and the operation unit that is operated by the driving member between the operation member and the first rotation member And a transmission switching unit that switches a transmission state of the electric driving force.挿入装置は、回動軸を中心として回動可能な状態で設けられ、回動することにより第1の線状部を牽引する第1の回動部材と、前記回動軸を中心として回動可能な状態で設けられ、回動することにより前記第2の線状部を牽引する第2の回動部材と、を備える。前記挿入装置は、駆動部材が駆動されることにより、伝達される電動駆動力によって作動される作動ユニットと、前記作動ユニットと前記第1の回動部材との間での前記駆動部材からの前記電動駆動力の伝達状態を切替える伝達切替え部と、を備える。
