A liquid material application device comprising: a discharge head including a discharge port for discharging a liquid material; a discharge amount controller for controlling an amount of the liquid material discharged from the discharge port; a worktable on which a workpiece is placed; a robot for moving the discharge head and the worktable relative to each other; and a control unit (30, 40) including an arithmetic device and a storage device for storing an application program, the liquid material application device applying the liquid material to be drawn in the form of a line on the workpiece while the workpiece and the discharge head are moved relative to each other, wherein the application program contains a relative movement command for moving the workpiece and the discharge head relative to each other in accordance with an application pattern, and description of a scalar quantity of a relative moving speed between the workpiece and the discharge head, and the control unit (30, 40) includes a first control unit for moving the workpiece and the discharge head relative to each other in accordance with the application program, and a second control unit for controlling a discharge amount of the discharge head, characterized in that the first control unit comprises a storage device and an arithmetic device, the second control unit comprises a storage device and an arithmetic device, the first control unit and the second control unit are electrically connected to each other via cables for communication therebetween, the first control unit has a function of transmitting the scalar quantity to the second control unit, and the second control unit includes a conversion unit for outputting discharge amount information corresponding to the scalar quantity and has a function of automatically controlling the discharge amount of the discharge head by, on the basis of the scalar quantity transmitted from the first control unit, dynamically generating the discharge amount control command of the discharge amount controller for causing the discharge head to apply the liquid material and to draw a line in a uniform width. a discharge head including a discharge port for discharging a liquid material; a discharge amount controller for controlling an amount of the liquid material discharged from the discharge port; a worktable on which a workpiece is placed; a robot for moving the discharge head and the worktable relative to each other; and a control unit (30, 40) including an arithmetic device and a storage device for storing an application program, the liquid material application device applying the liquid material to be drawn in the form of a line on the workpiece while the workpiece and the discharge head are moved relative to each other, wherein the application program contains a relative movement command for moving the workpiece and the discharge head relative to each other in accordance with an application pattern, and description of a scalar quantity of a relative moving speed between the workpiece and the discharge head, and the control unit (30, 40) includes a first control unit for moving the workpiece and the discharge head relative to each other in accordance with the application program, and a second control unit for controlling a discharge amount of the discharge head, characterized in that the first control unit comprises a storage device and an arithmetic device, the second control unit comprises a storage device and an arithmetic device, the first control unit and the second control unit are electrically connected to each other via cables for communication therebetween, the first control unit has a function of transmitting the scalar quantity to the second control unit, and the second control unit includes a conversion unit for outputting discharge amount information corresponding to the scalar quantity and has a function of automatically controlling the discharge amount of the discharge head by, on the basis of the scalar quantity transmitted from the first control unit, dynamically generating the discharge amount control command of the discharge amount controller for causing the discharge head to apply the liquid material and to draw a line in a uniform width.