A fuel injection control device to control a fuel injection valve including a drive coil to generate an electromagnetic attraction force by being conducted, a movable core to be attracted by the electromagnetic attraction force of the drive coil, and a valve body to separate from a valve seat and open a fuel passage (11a, 14a) by attracting the movable core from the state of contact with the valve seat and thus closing the fuel passage, the fuel injection control device comprising: an injection control unit to execute full lift injection of controlling the drive coil by an injection command pulse allowing a lift quantity of the valve body to reach a full lift position and partial lift injection of controlling the drive coil by an injection command pulse allowing the lift quantity of the valve body not to reach the full lift position; a voltage detection unit to detect the change of an induced electromotive force generated in the drive coil after a time when an injection command pulse is switched off by intercepting an electric current supplied to the drive coil and displacing the valve body in the direction of valve closing as a voltage value; a valve closing detection unit to detect a valve closing timing by using either of an electromotive force quantity detection mode of detecting the valve closing timing by comparing an accumulated quantity of voltage values detected by the voltage detection unit and a prescribed reference quantity and a timing detection mode of detecting an inflection point of a voltage value detected by the voltage detection unit as a valve closing timing in order to detect the valve closing timing when the valve body shifts to valve closing in the partial lift injection; and a selection unit to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, wherein the selection unit selects the timing detection mode when a requested injection quantity is larger than a prescribed reference injection quantity in the partial lift injection, and selects the electromotive force quantity detection mode when the requested injection quantity is smaller than the reference injection quantity. an injection control unit to execute full lift injection of controlling the drive coil by an injection command pulse allowing a lift quantity of the valve body to reach a full lift position and partial lift injection of controlling the drive coil by an injection command pulse allowing the lift quantity of the valve body not to reach the full lift position; a voltage detection unit to detect the change of an induced electromotive force generated in the drive coil after a time when an injection command pulse is switched off by intercepting an electric current supplied to the drive coil and displacing the valve body in the direction of valve closing as a voltage value; a valve closing detection unit to detect a valve closing timing by using either of an electromotive force quantity detection mode of detecting the valve closing timing by comparing an accumulated quantity of voltage values detected by the voltage detection unit and a prescribed reference quantity and a timing detection mode of detecting an inflection point of a voltage value detected by the voltage detection unit as a valve closing timing in order to detect the valve closing timing when the valve body shifts to valve closing in the partial lift injection; and a selection unit to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, wherein the selection unit selects the timing detection mode when a requested injection quantity is larger than a prescribed reference injection quantity in the partial lift injection, and selects the electromotive force quantity detection mode when the requested injection quantity is smaller than the reference injection quantity. selects the timing detection mode when a requested injection quantity is larger than a prescribed reference injection quantity in the partial lift injection, and selects the electromotive force quantity detection mode when the requested injection quantity is smaller than the reference injection quantity.