PROBLEM TO BE SOLVED: To provide an optical interference tomographic imaging apparatus capable of adjusting a line-shaped measurement light with respect to an eye to be examined in a desired direction (direction) without increasing the size of the apparatus and increasing the burden on the subject. SOLUTION: A coupler 120 that branches light from a light source 110 into measurement light and reference light, a measurement optical system 130 that guides the measurement light to an eye to be inspected, a reference optical system 140 that propagates the reference light, and a measurement optical system. A beam splitter 150 that combines the return light of the measurement light propagating through 130 from the eye E to be examined and the reference light propagating through the reference optical system 140, and the return light and reference light obtained by the combined wave of the beam splitter 150. The measurement optical system 130 includes a line sensor 162 that detects the interference light of the above as an interference signal, and the measurement optical system 130 is oriented in the line-shaped measurement light with respect to the eye E to be examined when the line-shaped measurement light is irradiated to the eye E. It is configured to include an image rotator 135 for adjustment. [Selection diagram] Fig. 1【課題】装置の大型化を回避するとともに被検者の負担を増加させることなく、被検眼に対するライン状の測定光を所望の方向（向き）に調整できる光干渉断層撮像装置を提供する。【解決手段】光源１１０からの光を測定光と参照光とに分岐するカプラ１２０と、測定光を被検眼に導く測定光学系１３０と、参照光を伝搬させる参照光学系１４０と、測定光学系１３０を伝搬した測定光の被検眼Ｅからの戻り光と参照光学系１４０を伝搬した参照光とを合波させるビームスプリッタ１５０と、ビームスプリッタ１５０の合波により得られた戻り光と参照光との干渉光を干渉信号として検出するラインセンサ１６２とを備え、測定光学系１３０は、被検眼Ｅに対してライン状の測定光を照射する際に被検眼Ｅに対するライン状の測定光における向きの調整を行うイメージローテータ１３５を含み構成されている。【選択図】図１
