PROBLEM TO BE SOLVED: To provide an optical coherence tomography apparatus capable of obtaining excellent motion contrast data (hereinafter called MC data).SOLUTION: The optical coherence tomography apparatus comprises: an OCT optical system for acquiring OCT signals； scan means for scanning a subject eye with measurement light projected onto the subject eye； scan control means for controlling the scan means, scan control means performing first scan control to obtain a first OCT signal group comprising at least four temporally different OCT signals in an identical scan position, and second scan control to obtain a second OCT signal group comprising at least four temporally different OCT signals in the same scan position as the first scan group； and arithmetic processing means for obtaining third MC data based on first MC data which is based on the first OCT signal group obtained by the first scan control and on second MC data which is based on the second OCT signal group obtained by the second scan control.SELECTED DRAWING: Figure 7【課題】良好なモーションコントラストデータ（以下、ＭＣデータ）を得ることができる光コヒーレンストモグラフィ装置を提供する。【解決手段】ＯＣＴ信号を取得するためのＯＣＴ光学系と、前記被検眼に照射される測定光を被検眼上で走査させるための走査手段と、前記走査手段を制御する走査制御手段であって、同一の走査位置において時間的に異なる少なくとも４つのＯＣＴ信号を含む第１のＯＣＴ信号群を得るための第１の走査制御と、第１のＯＣＴ信号群と同一の走査位置において時間的に異なる少なくとも４つのＯＣＴ信号を含む第２のＯＣＴ信号群を得るための第２の走査制御と、を行う走査制御手段と、前記第１の走査制御にて得られた前記第１のＯＣＴ信号群に基づく第１のＭＣデータと、前記第２の走査制御にて得られた前記第２のＯＣＴ信号群に基づく第２のＭＣデータと、に基づいて第３のＭＣデータを得る演算処理手段と、を備える。【選択図】図７
