A body fluid collection device includes a long shaft member having a lumen formed along a longitudinal axis, an absorption body configured to expand from an initial state in which a body fluid is not absorbed into the absorption body as the body fluid is absorbed, and having a proximal end portion configured to be disposed in the lumen when a predetermined amount of the body fluid is absorbed into the absorption body, and an identification section for identifying that the absorption body has absorbed the predetermined amount of the body fluid.
