A combination of a thin type battery and a circuit board is provided, including a thin type battery, a circuit board, and a joint connector. The thin type battery includes a shell body, a soft packaging cell, and an electric connector. The joint connector is disposed at the circuit board and connected electrically to a circuit of the circuit board. The soft packaging cell of the thin type battery is disposed in the shell body and includes a battery body and a top sealing area. The electric connector is connected electrically to the soft packaging cell. The electric connector can be plugged into the joint connector in a first direction or a second direction, so that the thin type battery can be plugged into the mobile electronic device through the electric connector in the first direction or second direction, to supply power.