PROBLEM TO BE SOLVED: To provide an automatic blood separator for subjecting blood to centrifugation and reliably obtaining prescribed components such as a cell and a lymphocyte.SOLUTION: The automatic blood separator has an enclosure and a controller disposed inside or outside the enclosure, with a centrifugal machine, a sample housing part, an action part and a drive part within the enclosure. The action part has at least a test tube holding mechanism and an auto-pipet mechanism; the drive part transfers the action part in an upper space of the centrifugal machine and the sample housing part; the centrifugal machine has a protective wall surface with a see-through window opened in part of the surrounding lateral face, with an imaging device capable of imaging the inside of the centrifugal machine via the see-through window, disposed outside the see-through window; and the controller controls the centrifugal machine, the action part, the drive part and the imaging device.SELECTED DRAWING: Figure 1【課題】血液を遠心分離に供し、細胞やリンパ球等の所望の成分を確実に得るための自動血液分離装置を提供することを目的とする。【解決手段】筐体と、筐体の内部又は外部に備えられた制御部とを有し、前記筐体の内部に、遠心分離機と、サンプル収納部と、動作部と、駆動部と、を備え、前記動作部は、少なくとも試験管保持機構と自動ピペット機構とを有し、前記駆動部は、前記遠心分離機及び前記サンプル収納部の上部空間内で前記動作部を移動させ、前記遠心分離機は、周囲側面の一部に透視窓が設けられた防護壁面を有し、前記透視窓の外側に、当該透視窓を通して遠心分離機の内部を撮像可能な撮像装置が備えられており、前記制御部が、前記遠心分離機、前記動作部、前記駆動部及び前記撮像装置を制御する、自動血液分離装置。【選択図】図1