A portable electronic device is provided. The portable electronic device includes a housing, a circuit board, an amplifier, an antenna and a short element. The circuit board is disposed in the housing, wherein the circuit board includes a first edge and a second edge, and the first edge is opposite to the second edge. The amplifier is disposed on the circuit board and adjacent to the first edge. The antenna is disposed on the second edge of the circuit board, wherein the antenna transmits a wireless signal. The short element is disposed on the second edge of the circuit board, wherein the short element is separated from the antenna, and the short element couples with the antenna to reduce Specific Absorption Rate (SAR) value around the amplifier.