A portable electronic device includes a lower member, an upper member, a strip-storing unit and an electric connecting strip. The lower member is provided with a keyboard module. The upper member is slidably disposed on the lower member. The strip-storing unit is disposed in the lower member. The electric connecting strip is retractably disposed in the strip-storing unit, and two ends thereof are respectively connected to the upper member and the lower member. When the upper member slides on the lower member, a part of the electric connecting strip is pulled out or pulled back into the strip-storing unit.