The invention relates to the technical field of performing power generation by using the temperature difference, and provides a power generation device. The power generation device comprises N-type semiconductors (1), P-type semiconductors (2), conductive connecting bands (3) and heat conduction insulating layers (4), and is characterized in that the N-type semiconductors (1) and the P-type semiconductors (2) are connected between a cold source (6) and a heat source (7), and the N-type semiconductors (1) and the P-type semiconductors (2) are arranged in a staggered manner; each conductive connecting band (3) is used for connecting the adjacent N-type semiconductor (1) and the P-type semiconductor (2); and the heat conduction insulating layers (4) are placed between the cold source (6) and the conductive connecting bands (3) and between the heat source (7) and the conductive connecting bands (3). The invention provides a self-power-generation shaver, which comprises the power generation device and a shaver body (8), wherein the shaver body (8) is provided with a charging interface, and the power generation device charges the shaver body (8) through the charging interface. The power generation device can effectively save a part of power consumed in the daily life.