An objective of the present invention is to carry out a circulatory measurement with a high degree of reliability. An optical image measurement device of an embodiment comprises an optical assembly, a scanning unit, an image forming unit, a blood vessel region identification unit, and a circulatory information generation unit. The optical assembly segments light from a light source into a signal beam and a reference beam, and detects a coherent light of scattered light of the signal beam from a lifeform and the reference beam which is routed via a reference beam path. The scanning unit carries out a first scan in which a first cross-section which intersects with a blood vessel of interest of the lifeform is repeatedly scanned with the signal beam. On the basis of the result of the detection of the coherent light which is obtained in the first scan by the optical assembly, the image forming unit forms a first tomographic image which represents a time series change of a form in the first cross-section and a phase image which represents a time series change of a phase difference. The blood vessel region identification unit identifies a blood vessel region corresponding to the blood vessel of interest for both the first tomographic image and the phase image. The circulatory information generation unit generates circulatory information relating to the blood vessel of interest on the basis of the blood vessel region of the first tomographic image and the time series change of the phase difference in the blood vessel region of the phase image.La présente invention concerne la réalisation dune mesure concernant la circulation avec un degré élevé de fiabilité. Un dispositif optique de mesure dimage selon un mode de réalisation comprend un assemblage optique, une unité de balayage, une unité de formation dimage, une unité didentification dune région de vaisseau sanguin et une unité de génération dinformations concernant la circulation. Lassemblage optique segmente la lumière
