Disclosed is a card type electrocardio measuring device, including: a circuit board (101), a main body bracket (102) and a back encapsulation the circuit board (101) is arranged on the front of the main body bracket (102) the back encapsulation is arranged on the back of the main body bracket (102) the main body bracket (102) has a hollow shape, and electronic components on the circuit board (101) are respectively accommodated fitly between the back of the circuit board (101) and the back encapsulation, in a way of penetrating a hollow portion of the main body bracket (102).
