In order to present information to the driver at an appropriate timing, a recognition timing estimation device and a recognition timing estimation method that can accurately estimate the timing of thedriver's cognitive action are provided. The present invention is a recognition timing estimation device that estimates a timing at which a driver performs a cognitive action of recognizing information related to a next trip when traveling on a travel path composed of a plurality of trips. The recognition timing estimation device comprises a travel information acquisition unit that drives at leastone of driving information and information related to the travel route; a travel estimation unit that estimates a boundary between the travels based on the travel information; an eye detection unit that detects a predetermined eye motion of the driver; and a recognition timing estimation unit, which estimates the timing at which the driver performs the recognition action, in terms of boundary between each of the strokes, and based on the time when the vehicle passes the boundary and the time when the specified eye movement is detected.