A lens driving device comprising: a housing comprising a plurality of protruding portions provided on an upper surface thereof; a magnet disposed on a side portion of the housing; a bobbin disposed in the housing; a first coil disposed on an outer circumferential surface of the bobbin; an upper elastic member coupled to the bobbin and the housing; and a sensing coil disposed on the side portion of the housing and configured to generate an inductive voltage by interaction with the first coil, wherein the bobbin is configured to be moved by interaction between the magnet and the first coil, wherein the sensing coil is disposed between the plurality of protruding portions (144a1- 144a4, 144b1-144b4) and the magnet, wherein the housing comprises stoppers protruding from an upper surface of the plurality of protruding portions (144a1- 144a4, 144bl- 144b4), and at least a portion of the upper elastic member is disposed on the upper surface of the housing between the plurality of protruding portions (144a1- 144a4, 144bl-144b4), wherein the side portion of the housing comprises first side portions on which the magnet is disposed; and second side portions, each interconnecting two adjacent first side portions among the first side portions, and wherein the sensing coil is disposed on an outer surface of the first and second side portions so as to be wound in a clockwise or counterclockwise direction about an optical axis, the housing includes a sensing coil seating groove for winding the sensing coil 170, the sensing coil seating groove is recessed from the outer surface of the first side portions and the second side portions of the housing, and is formed from one end to the other end of the first side portions and the second side portions, and the sensing coil seating groove is in contact with lower ends of the plurality of protruding portions (144a1- 144a4, 144bl- 144b4). a housing comprising a plurality of protruding portions provided on an upper surface thereof; a magnet disposed on a side portion of the housing; a bobbin disposed in the housing; a first coil disposed on an outer circumferential surface of the bobbin; an upper elastic member coupled to the bobbin and the housing; and a sensing coil disposed on the side portion of the housing and configured to generate an inductive voltage by interaction with the first coil, wherein the bobbin is configured to be moved by interaction between the magnet and the first coil, wherein the sensing coil is disposed between the plurality of protruding portions (144a1- 144a4, 144b1-144b4) and the magnet, wherein the housing comprises stoppers protruding from an upper surface of the plurality of protruding portions (144a1- 144a4, 144bl- 144b4), and at least a portion of the upper elastic member is disposed on the upper surface of the housing between the plurality of protruding portions (144a1- 144a4, 144bl-144b4), wherein the side portion of the housing comprises first side portions on which the magnet is disposed; and second side portions, each interconnecting two adjacent first side portions among the first side portions, and wherein the sensing coil is disposed on an outer surface of the first and second side portions so as to be wound in a clockwise or counterclockwise direction about an optical axis, the housing includes a sensing coil seating groove for winding the sensing coil 170, the sensing coil seating groove is recessed from the outer surface of the first side portions and the second side portions of the housing, and is formed from one end to the other end of the first side portions and the second side portions, and the sensing coil seating groove is in contact with lower ends of the plurality of protruding portions (144a1- 144a4, 144bl- 144b4).