A travel control device comprising: a first information acquisition unit configured to acquire subject vehicle information including a position of a subject vehicle; a second information acquisition unit configured to acquire lane marker information including positions of lane markers existing around the subject vehicle; a setting unit configured to set a pair of control areas (R1, R2; R3, R4; R7, R6; R8, R9) at right and left of the subject vehicle with reference to the lane markers, the control areas each having a predetermined width (WT, WR); and a control unit configured to control a travel position of the subject vehicle so that the subject vehicle travels between the pair of control areas (R1, R2; R3, R4; R7, R6; R8, R9), the travel position of the subject vehicle being along a width direction of a travel lane in which the subject vehicle is traveling, the setting unit being further configured to: detect a change-point lane marker on a basis of the lane marker information, the change-point lane marker being a lane marker crossing a width direction line including a course change point at which the subject vehicle starts course change and extending by a predetermined distance, the course change point being located ahead of the subject vehicle in a travel direction, characterized in that the setting unit is further configured such that: for the pair of control areas (R3, R4; R7, R6; R8, R9) set with reference to the change-point lane marker, a ratio (WR/WT) of a width of the control area (R3; R7; R8) on the other side of the turning point side of the subject vehicle to a width of the control area (R4; R6; R9) on the turning point side of the subject vehicle is set to be larger than the ratio (WR/WT) of the widths of adjacent control areas set with reference to a lane marker other than the change-point lane marker, the lane marker other than the change-point lane marker existing within a region from the course change point to a point in front of the subject vehicle. a first information acquisition unit configured to acquire subject vehicle information including a position of a subject vehicle; a second information acquisition unit configured to acquire lane marker information including positions of lane markers existing around the subject vehicle; a setting unit configured to set a pair of control areas (R1, R2; R3, R4; R7, R6; R8, R9) at right and left of the subject vehicle with reference to the lane markers, the control areas each having a predetermined width (WT, WR); and a control unit configured to control a travel position of the subject vehicle so that the subject vehicle travels between the pair of control areas (R1, R2; R3, R4; R7, R6; R8, R9), the travel position of the subject vehicle being along a width direction of a travel lane in which the subject vehicle is traveling, the setting unit being further configured to: detect a change-point lane marker on a basis of the lane marker information, the change-point lane marker being a lane marker crossing a width direction line including a course change point at which the subject vehicle starts course change and extending by a predetermined distance, the course change point being located ahead of the subject vehicle in a travel direction, characterized in that the setting unit is further configured such that: for the pair of control areas (R3, R4; R7, R6; R8, R9) set with reference to the change-point lane marker, a ratio (WR/WT) of a width of the control area (R3; R7; R8) on the other side of the turning point side of the subject vehicle to a width of the control area (R4; R6; R9) on the turning point side of the subject vehicle is set to be larger than the ratio (WR/WT) of the widths of adjacent control areas set with reference to a lane marker other than the change-point lane marker, the lane marker other than the change-point lane marker existing within a region from the course change point to a point in front of the subject vehicle.