A mobile terminal comprising: a display unit; a first body comprising a front surface, a rear surface and one open side; a battery receiving unit provided in the first body; a main board mounted in the first body; a second body coupled to the open side of the first body; a battery coupled to the second body and provided in the battery receiving unit; wherein the first body comprises a first metal portion on the rear surface and a resin portion provided at one end of the first metal portion, and wherein the second body comprises a second metal portion provided on an outer surface, an inner frame mounted in the second body; an antenna pattern (2111, 2112, 2121, 2122) formed in an internal surface of the inner frame; a first connection pin configured to electrically connect the main board and the antenna pattern to each other; wherein the antenna pattern comprises a second connection pin connected to the second metal portion, a fixing hook provided in one of the first body and the second body; a moving hook provided in the other one of the first body and the second body and having a shape corresponding to a shape of the fixing hook; and a releasing button configured to release the moving hook from the fixing hook by applying a predetermined force to the moving hook, wherein the fixing hook comprises a step and an inclined surface provided in a first direction facing the open side of the first body, and wherein the moving hook comprises a step and an inclined surface facing a direction opposite the first direction, wherein the main board is configured so that control signals are transmitted and received via the antenna pattern. a display unit; a first body comprising a front surface, a rear surface and one open side; a battery receiving unit provided in the first body; a main board mounted in the first body; a second body coupled to the open side of the first body; a battery coupled to the second body and provided in the battery receiving unit; wherein the first body comprises a first metal portion on the rear surface and a resin portion provided at one end of the first metal portion, and wherein the second body comprises a second metal portion provided on an outer surface, an inner frame mounted in the second body; an antenna pattern (2111, 2112, 2121, 2122) formed in an internal surface of the inner frame; a first connection pin configured to electrically connect the main board and the antenna pattern to each other; wherein the antenna pattern comprises a second connection pin connected to the second metal portion, a fixing hook provided in one of the first body and the second body; a moving hook provided in the other one of the first body and the second body and having a shape corresponding to a shape of the fixing hook; and a releasing button configured to release the moving hook from the fixing hook by applying a predetermined force to the moving hook, wherein the fixing hook comprises a step and an inclined surface provided in a first direction facing the open side of the first body, and wherein the moving hook comprises a step and an inclined surface facing a direction opposite the first direction, wherein the main board is configured so that control signals are transmitted and received via the antenna pattern.