A lens moving apparatus comprising: a housing ; a bobbin disposed in the housing , to which a lens is mounted; a first coil disposed on an outer peripheral surface of the bobbin , wherein a first drive signal is applied to the first coil ; a magnet disposed on the housing ; a second coil disposed on the housing ; a magnetic member attached to the second coil ; and a circuit board disposed below the housing and conductively connected to the second coil ; and a third coil disposed on the circuit board and facing the magnet ; wherein the bobbin is movable in a first direction via electromagnetic interaction between the first coil and the magnet , wherein the second coil is configured to generate an induced voltage by interaction with the first coil for detecting a position or displacement of the bobbin , the magnetic member is spaced apart from the bobbin and configured to increase an intensity of the induction voltage, and the circuit board is configured to receive the induced voltage, wherein the housing includes a mounting portion , the mounting portion including: a support surface (1149-1a) positioned under a peripheral region of an upper surface of the housing and having a height difference with respect to the upper surface (1149-la) in an optical-axis direction; and a side surface (1149-lb) positioned between the upper surface and the support surface (1149-la), wherein the magnetic member and the second coil are disposed on the mounting portion . a housing ; a bobbin disposed in the housing , to which a lens is mounted; a first coil disposed on an outer peripheral surface of the bobbin , wherein a first drive signal is applied to the first coil ; a magnet disposed on the housing ; a second coil disposed on the housing ; a magnetic member attached to the second coil ; and a circuit board disposed below the housing and conductively connected to the second coil ; and a third coil disposed on the circuit board and facing the magnet ; wherein the bobbin is movable in a first direction via electromagnetic interaction between the first coil and the magnet , wherein the second coil is configured to generate an induced voltage by interaction with the first coil for detecting a position or displacement of the bobbin , the magnetic member is spaced apart from the bobbin and configured to increase an intensity of the induction voltage, and the circuit board is configured to receive the induced voltage, wherein the housing includes a mounting portion , the mounting portion including: a support surface (1149-1a) positioned under a peripheral region of an upper surface of the housing and having a height difference with respect to the upper surface (1149-la) in an optical-axis direction; and a side surface (1149-lb) positioned between the upper surface and the support surface (1149-la), wherein the magnetic member and the second coil are disposed on the mounting portion . a support surface (1149-1a) positioned under a peripheral region of an upper surface of the housing and having a height difference with respect to the upper surface (1149-la) in an optical-axis direction; and a side surface (1149-lb) positioned between the upper surface and the support surface (1149-la), wherein the magnetic member and the second coil are disposed on the mounting portion . <EOS>