An electronic component package and a manufacturing method thereof are disclosed. A method of manufacturing an electronic component package, which includes: forming a protrusion part on a first carrier board; stacking an insulation layer on the first carrier board and forming a circuit pattern, which includes a bonding pad and a solder ball pad, on the surface of the insulation layer; mounting an electronic component on the surface of the insulation layer and electrically connecting the electronic component and the bonding pad; and removing the first carrier board and the protrusion part, allows the mounting of the electronic component with just a single circuit pattern layer.