A lens drive device, comprising: a fixed assembly (3-FA); a movable assembly (3-MA), including a lens holder which is configured to be connected to an optical element, wherein the movable assembly (3-MA) is movable relative to the fixed assembly (3-FA), and the optical element is a lens and has an optical axis (3-O); a driving assembly (3-DA), configured to drive the movable assembly (3-MA) to move relative to the fixed assembly (3-FA); wherein a main axis (3-AX) is defined by the fixed assembly (3-FA), and the main axis (3-AX) overlaps the optical axis (3-O); wherein the fixed assembly includes a casing and a base, and the casing and the base are arranged along the main axis (3-AX); wherein the driving assembly (3-DA) further includes a first coil (3-CL11), and the first coil (3-CL11) includes a wire (3-WL); characterized in that the first coil is affixed to the lens holder; the winding axis of the first coil is perpendicular to the optical axis; the wire (3-WL) of the first coil (3-CL11) having a leading end (3-WL1), wherein the wire (3-WL) has a rectangular structure, the rectangular structure has a first side (3-WLS1) and a second side (3-WLS2), and an extending direction of the first side (3-WLS1) is different from an extending direction of the second side (3-WLS2); wherein a length of the first side (3-WLS1) is different from a length of the second side (3-WLS2); the lens holder of the movable assembly (3-MA) has a fixing element, and the fixing element protrudes from a side of the lens holder, wherein the fixing element has a contact surface 3-1088, and the leading end is connected to the contact surface; the contact surface is perpendicular to the main axis (3-AX) and the optical axis; and the wire (3-WL) of the first coil (3-CL11) does not wind around the protruding portion. a fixed assembly (3-FA); a movable assembly (3-MA), including a lens holder which is configured to be connected to an optical element, wherein the movable assembly (3-MA) is movable relative to the fixed assembly (3-FA), and the optical element is a lens and has an optical axis (3-O); a driving assembly (3-DA), configured to drive the movable assembly (3-MA) to move relative to the fixed assembly (3-FA); wherein a main axis (3-AX) is defined by the fixed assembly (3-FA), and the main axis (3-AX) overlaps the optical axis (3-O); wherein the fixed assembly includes a casing and a base, and the casing and the base are arranged along the main axis (3-AX); wherein the driving assembly (3-DA) further includes a first coil (3-CL11), and the first coil (3-CL11) includes a wire (3-WL); characterized in that the first coil is affixed to the lens holder; the winding axis of the first coil is perpendicular to the optical axis; the wire (3-WL) of the first coil (3-CL11) having a leading end (3-WL1), wherein the wire (3-WL) has a rectangular structure, the rectangular structure has a first side (3-WLS1) and a second side (3-WLS2), and an extending direction of the first side (3-WLS1) is different from an extending direction of the second side (3-WLS2); wherein a length of the first side (3-WLS1) is different from a length of the second side (3-WLS2); the lens holder of the movable assembly (3-MA) has a fixing element, and the fixing element protrudes from a side of the lens holder, wherein the fixing element has a contact surface 3-1088, and the leading end is connected to the contact surface; the contact surface is perpendicular to the main axis (3-AX) and the optical axis; and the wire (3-WL) of the first coil (3-CL11) does not wind around the protruding portion.