[Object] To improve accuracy of flow velocity measurement or the like of particulates such as erythrocytes.
[Solving Means] A speckle measurement apparatus includes an imager that captures scattered light images returned from an object to be measured when the object to be measured is irradiated with coherent light as speckle images, and a controller that determines a measurement area that is the same site of the object to be measured in a plurality of the speckle images captured continuously in time series by the imager by incorporating a displacement amount of a relative positional relationship between the object to be measured and the imager.