A cable anchoring device may be provided that includes: an anchoring cap which includes a fastening protrusion for the fastening to a bracket; an anchoring socket which includes a first body in which a bracket anchoring groove is formed, and a second body which is inserted into the anchoring cap; and a pressing member which is disposed between the second body and the anchoring cap. When the bracket is inserted into the bracket anchoring groove, the anchoring cap moves by the pressing member, so that the fastening protrusion is inserted into a fastening groove of the bracket.