A continuous variable valve duration apparatus including: a camshaft ; a cam device on which a cam is formed, of which the camshaft is configured to be inserted thereto and of which a relative phase angle with respect to the camshaft is variable; an internal bracket transmitting a rotation of the camshaft to the cam device ; a wheel housing in which the internal bracket is rotatably inserted, on which a guide groove parallel to the camshaft is formed, and on which a guide hole vertical to the camshaft is formed; a guide portion including a guide shaft inserted into the guide hole for guiding a movement of the wheel housing ; and a control portion including a control shaft disposed parallel to the camshaft and inserted into the guide groove , and the control portion selectively rotating the control shaft for a relative position of the wheel housing with respect to the camshaft to be changed, wherein a first sliding hole and a second sliding hole are formed at the internal bracket respectively, and a cam slot is formed at the cam device , and wherein the continuous variable valve duration apparatus further includes: a slider pin connected to the camshaft and rotatably inserted into the first sliding hole ; and a roller cam slidably inserted into the cam slot and rotatably inserted into the second sliding hole , and wherein the slider pin includes: a pin body slidably inserted into the camshaft ; and a pin head rotatably inserted into the first sliding hole , wherein preferably the pin body and the pin head are integrally formed. a camshaft ; a cam device on which a cam is formed, of which the camshaft is configured to be inserted thereto and of which a relative phase angle with respect to the camshaft is variable; an internal bracket transmitting a rotation of the camshaft to the cam device ; a wheel housing in which the internal bracket is rotatably inserted, on which a guide groove parallel to the camshaft is formed, and on which a guide hole vertical to the camshaft is formed; a guide portion including a guide shaft inserted into the guide hole for guiding a movement of the wheel housing ; and a control portion including a control shaft disposed parallel to the camshaft and inserted into the guide groove , and the control portion selectively rotating the control shaft for a relative position of the wheel housing with respect to the camshaft to be changed, wherein a first sliding hole and a second sliding hole are formed at the internal bracket respectively, and a cam slot is formed at the cam device , and wherein the continuous variable valve duration apparatus further includes: a slider pin connected to the camshaft and rotatably inserted into the first sliding hole ; and a roller cam slidably inserted into the cam slot and rotatably inserted into the second sliding hole , and a slider pin connected to the camshaft and rotatably inserted into the first sliding hole ; and a roller cam slidably inserted into the cam slot and rotatably inserted into the second sliding hole , and wherein the slider pin includes: a pin body slidably inserted into the camshaft ; and a pin head rotatably inserted into the first sliding hole , wherein preferably the pin body and the pin head are integrally formed. a pin body slidably inserted into the camshaft ; and a pin head rotatably inserted into the first sliding hole , wherein preferably the pin body and the pin head are integrally formed. <EOS>