Provided is a power actuator system for actuating a closure member ( 1 ) such as a trunk lid which is compact in size and has a minimized protrusion. A first link ( 8 ) is connected to an output shaft of a powered actuator ( 7 ), and a free end of the first link is connected to an end of a second link ( 9 ). The other end of the second link is pivotally connected to a hinge arm ( 4 ) which is fixedly attached to a closure member and pivotally supports the closure member to a fixed part such as a vehicle body. The first link is adapted to extend substantially from the output shaft towards the closure member as the first link swing around the output shaft, and the second link extends substantially perpendicularly with respect to the center line.