At the same time brief the cohesion quantity is calculated low at cost. As for the cohesion quantitative measuring device for that, speed of blood corpuscle C or it flows from the blood style pictures which can and by the TV camera 3 which photographs the flow of the blood and TV camera 3 calculates angle, speed of particular blood corpuscle C or flows and the cohesion territory R1, it distinguishes R2 on the basis of angle, the particular cohesion territory R1, it has with the transaction of operation section 70 which calculates the cohesion quantity in R2短時間且つ低コストで凝集量を算出する。そのための凝集量計測装置は、血液の流れを撮影するTVカメラ3と、TVカメラ3によって得られた血流画像から血球Cの速度又は流れ角度を算出し、当該血球Cの速度又は流れ角度に基づいて凝集領域R1,R2を判別し、当該凝集領域R1,R2における凝集量を算出する演算処理部70とを備える。
