A mobile terminal comprising: a case unit (102, 104, 151a) comprising a plurality of case parts (102, 104) defining an outer appearance; a waterproof member configured to waterproof a gap between the plurality of case parts and a display unit; an inner space formed by coupling of the plurality of case parts with the waterproof member; a vent hole that is formed in the case unit (102, 104, 151a) and configured to balance an air pressure between an outside and the inner space; a sound output unit mounted in the inner space; an electronic component (182, 183) mounted in the inner space; at least one processor configured to control the sound output unit; a resonance space provided in the inner space and configured to resonate sound that is output from the sound output unit; and a sound hole provided at one side of the case unit (102, 104, 151a) and configured to output a first sound, wherein the sound output unit comprises: - a diaphragm positioned on one surface; - a voice coil positioned on a rear surface of the diaphragm; - a ring magnet positioned outside the voice coil, the ring magnet comprising a plurality of unit magnets spaced apart from a corner of the sound output unit; - a frame (1526, 1529) configured to expose the diaphragm and to cover a lateral surface and a rear surface of the magnet and the voice coil; and - a resonance hole formed at a corner of the sound output unit. a case unit (102, 104, 151a) comprising a plurality of case parts (102, 104) defining an outer appearance; a waterproof member configured to waterproof a gap between the plurality of case parts and a display unit; an inner space formed by coupling of the plurality of case parts with the waterproof member; a vent hole that is formed in the case unit (102, 104, 151a) and configured to balance an air pressure between an outside and the inner space; a sound output unit mounted in the inner space; an electronic component (182, 183) mounted in the inner space; at least one processor configured to control the sound output unit; a resonance space provided in the inner space and configured to resonate sound that is output from the sound output unit; and a sound hole provided at one side of the case unit (102, 104, 151a) and configured to output a first sound, wherein the sound output unit comprises: - a diaphragm positioned on one surface; - a voice coil positioned on a rear surface of the diaphragm; - a ring magnet positioned outside the voice coil, the ring magnet comprising a plurality of unit magnets spaced apart from a corner of the sound output unit; - a frame (1526, 1529) configured to expose the diaphragm and to cover a lateral surface and a rear surface of the magnet and the voice coil; and - a resonance hole formed at a corner of the sound output unit. - a diaphragm positioned on one surface; - a voice coil positioned on a rear surface of the diaphragm; - a ring magnet positioned outside the voice coil, the ring magnet comprising a plurality of unit magnets spaced apart from a corner of the sound output unit; - a frame (1526, 1529) configured to expose the diaphragm and to cover a lateral surface and a rear surface of the magnet and the voice coil; and - a resonance hole formed at a corner of the sound output unit.