An engine control device for work vehicle, comprising: a target rotation speed setting unit that sets a target rotation speed of an engine corresponding to an operation amount of an accelerator pedal; a rotation speed control unit that controls a rotation speed of the engine according to the target rotation speed; a travel driving unit (3, 4, 5) that transmits rotation of the engine to wheels (113, 123) via a torque converter; a speed ratio detection unit (14, 15) that detects a speed ratio between an input shaft and an output shaft of the torque converter; and a target rotation speed correction unit that corrects the target rotation speed set by the target rotation speed setting unit so as to increase the target rotation speed based on the speed ratio when the operation amount of the accelerator pedal is smaller than a predetermined value and the speed ratio detected by the speed ratio detection unit (14, 15) is smaller than a predetermined value within a range which is equal to or greater than 0 and less than 1, characterized in that: when the target rotation speed is corrected by the target rotation speed correction unit, the rotation speed control unit gradually increases the rotation speed of the engine toward the target rotation speed corrected by the target rotation speed correction unit; and when the target rotation speed setting unit again sets the target rotation speed that is not corrected and corresponds to the operation amount of the accelerator pedal after the target rotation speed was corrected by the target rotation speed correction unit, the rotation speed control unit immediately decreases the rotation speed of the engine to the target rotation speed set by the target rotation speed setting unit. a target rotation speed setting unit that sets a target rotation speed of an engine corresponding to an operation amount of an accelerator pedal; a rotation speed control unit that controls a rotation speed of the engine according to the target rotation speed; a travel driving unit (3, 4, 5) that transmits rotation of the engine to wheels (113, 123) via a torque converter; a speed ratio detection unit (14, 15) that detects a speed ratio between an input shaft and an output shaft of the torque converter; and a target rotation speed correction unit that corrects the target rotation speed set by the target rotation speed setting unit so as to increase the target rotation speed based on the speed ratio when the operation amount of the accelerator pedal is smaller than a predetermined value and the speed ratio detected by the speed ratio detection unit (14, 15) is smaller than a predetermined value within a range which is equal to or greater than 0 and less than 1, characterized in that: when the target rotation speed is corrected by the target rotation speed correction unit, the rotation speed control unit gradually increases the rotation speed of the engine toward the target rotation speed corrected by the target rotation speed correction unit; and when the target rotation speed setting unit again sets the target rotation speed that is not corrected and corresponds to the operation amount of the accelerator pedal after the target rotation speed was corrected by the target rotation speed correction unit, the rotation speed control unit immediately decreases the rotation speed of the engine to the target rotation speed set by the target rotation speed setting unit. when the target rotation speed is corrected by the target rotation speed correction unit, the rotation speed control unit gradually increases the rotation speed of the engine toward the target rotation speed corrected by the target rotation speed correction unit; and when the target rotation speed setting unit again sets the target rotation speed that is not corrected and corresponds to the operation amount of the accelerator pedal after the target rotation speed was corrected by the target rotation speed correction unit, the rotation speed control unit immediately decreases the rotation speed of the engine to the target rotation speed set by the target rotation speed setting unit.