An estimation method includes: transmitting transmission signals using M transmission antenna elements； receiving reception signals by N reception antenna elements； calculating, from the reception signals, a first matrix whose components are complex transfer functions indicating propagation characteristics between the transmission antenna elements and the reception antenna elements； estimating, using the first matrix, a position and an orientation of a living body relative to an estimation device； when the estimated position is in a first identification region and the estimated orientation is in a predetermined range from a first direction, identifying the living body based on time waveforms of the reception signals and a first training signal which is obtained in advance in the first identification region and corresponds to the living body； and adding, as an identification region for identifying the first living body identified, a new identification region based on an estimated position of the first living body identified.
