A living body stimulating electrode comprising: a first electrode that has at a tip of one end thereof a stimulating part that has an acute angled shape stimulating a skin of a living body, a second electrode that has at a tip of one end thereof a contact part that is in contact with a skin of a living body through a line or a plane and is formed with a prescribed positional relationship to the stimulating part, an engaging part (22, 23; 32, 33) that is formed in at least one of the other end of the first electrode and the other end of the second electrode, the engaging part having a fixing part (23; 32) that extends from the one end toward a direction to the other end, and a pressing part (22; 33) that extends in a side direction, and an insulating board that fixes and holds the fixing part, wherein: the living body stimulating electrode further comprises a flexible circuit board that is disposed between the first electrode and the second electrode, and the insulating board, and has a circuit that is electrically connected to each of the first electrode and the second electrode, the engaging part is fixed to and held by the insulating board by insertion of the fixing part into the insulating board with penetration through the flexible circuit board, and thereby the pressing part is in contact with the circuit and pressing and fixing the flexible circuit board to the insulating board, the fixing part and the pressing part are continuous with at least a part thereof through an inclined plane or a curved plane (B2, B3), and a portion of the inclined plane or the curved plane on the side of the fixing part is fixed to and held by the insulating board, whereas the other portion of the inclined plane or the curved plane on the side of the pressing part is in contact with the circuit, and presses and fixes the flexible circuit board to the insulating board. a first electrode that has at a tip of one end thereof a stimulating part that has an acute angled shape stimulating a skin of a living body, a second electrode that has at a tip of one end thereof a contact part that is in contact with a skin of a living body through a line or a plane and is formed with a prescribed positional relationship to the stimulating part, an engaging part (22, 23; 32, 33) that is formed in at least one of the other end of the first electrode and the other end of the second electrode, the engaging part having a fixing part (23; 32) that extends from the one end toward a direction to the other end, and a pressing part (22; 33) that extends in a side direction, and an insulating board that fixes and holds the fixing part, wherein: the living body stimulating electrode further comprises a flexible circuit board that is disposed between the first electrode and the second electrode, and the insulating board, and has a circuit that is electrically connected to each of the first electrode and the second electrode, the engaging part is fixed to and held by the insulating board by insertion of the fixing part into the insulating board with penetration through the flexible circuit board, and thereby the pressing part is in contact with the circuit and pressing and fixing the flexible circuit board to the insulating board, the fixing part and the pressing part are continuous with at least a part thereof through an inclined plane or a curved plane (B2, B3), and a portion of the inclined plane or the curved plane on the side of the fixing part is fixed to and held by the insulating board, whereas the other portion of the inclined plane or the curved plane on the side of the pressing part is in contact with the circuit, and presses and fixes the flexible circuit board to the insulating board. the living body stimulating electrode further comprises a flexible circuit board that is disposed between the first electrode and the second electrode, and the insulating board, and has a circuit that is electrically connected to each of the first electrode and the second electrode, the engaging part is fixed to and held by the insulating board by insertion of the fixing part into the insulating board with penetration through the flexible circuit board, and thereby the pressing part is in contact with the circuit and pressing and fixing the flexible circuit board to the insulating board, the fixing part and the pressing part are continuous with at least a part thereof through an inclined plane or a curved plane (B2, B3), and a portion of the inclined plane or the curved plane on the side of the fixing part is fixed to and held by the insulating board, whereas the other portion of the inclined plane or the curved plane on the side of the pressing part is in contact with the circuit, and presses and fixes the flexible circuit board to the insulating board.