A power supplier with combinable power output ports includes plural power output ports which include at least a unit output port, wherein the unit output port has two terminal slots in which two power terminals at different potentials are respectively mounted, and the unit output port can be combined with another power output port to form a combined output port having another voltage output. The power supplier of the present invention, according to the demands of the user, provides different voltage output standards or sets through combining the unit output port with another unit output port or combining the unit output port with the base level output port to transform into the needed voltage output.