Heartbeat detection device

A heart rate detecting device, comprising: a1 Pair of electric rod piece (4), a transmission part (2) and receiving part. The transmission part (2) through the electric wire (3) and 1 pair of electric rod piece (4) are electrically connected. 1 Pair of electric rod (4 each provided with an inserting penetrates, wherein the clothes of the lower part (4) and electric rod piece at body the electrode main body is regulated space is part (4a) and hooks (4b). Hook (4b) is formed on the electric rod piece (4) on the side part. The transmission part (2) with for inserting the upper part; the changing the part (2) of the upper part and equal transmission main body part (2a) and hooks (2b). Hook (2b) is formed on the transmission part (2) is part. Therefore, and collection the electric rod piece is provided with a constriction, contact the chest reliably the regulated space part, moreover light heart rate detecting device.