PURPOSE: A rock bolt type anchor for bedrock is provided to shorten construction period of the cement structure which constructed on the surface of a base rock and to stably fix an anchor when the anchor is installed in a hole of bedrock without ticking over. CONSTITUTION: A rock bolt type anchor(2) comprises an anchor shaft rod(10) and an anchor head(20). The anchor shaft rod comprises a screw unit(10a) and a wing expansion unit(10b). The anchor head is connected to a screw unit of the anchor shaft rod in the state of temporary assembly and includes a plurality of expanded wings(22) and a separation preventer(26). The expanded wings operates by being connected the expanded wings of the anchor shaft rod and stably fixes the anchor head in the hole of a bedrock. The separation preventer guides and supports in order for the wing expansion unit not to break away from a guide hole(24) generated outside.
