In this paper, we propose an IT convergence guitar for effective guitar instruction by utilizing IT technologies and its learning platform that enables for players to share performance contents between them. The IT convergence guitar recognizes information about fingerings and plucked strings by integrating sensors on the guitar. It checks whether a user played the guitar properly or not based on the sensed data and provides feedbacks accordingly. Also, it can generate music sheet data based on the played pitch and rhythm. Such music sheets can be shared with other users through our guitar learning platform. This helps not only novices to learn guitar efficiently but also intermediate or higher level players to learn various playing techniques and improvised performances by using music sheets shared by others. Educational effect of our proposed guitar and the learning platform is showed by conducting usability evaluation for practical music students.