Valve assembly for a fluid injection valve comprising - a valve body having a longitudinal axis and comprising a cavity, - a valve needle received in the cavity, operable to seal a fluid outlet end of the valve body in a closing position and axially moveable relative to the valve body away from the closing position in an opening direction for unsealing the fluid outlet end, and - a driving device positioned in the cavity for axially displacing the valve needle, the driving device being axially moveable relative to the valve body and to the valve needle, wherein - the valve needle comprises a shaft and a disc element, - the disc element and the driving device have mutually facing and radially extending coupling surfaces (321, 401), - the driving device is configured and arranged for taking the disc element with it for displacing the valve needle in the opening direction solely by means of hydraulic interaction between the coupling surfaces (321, 401) when the driving device is displaced in the opening direction, the coupling surface of the driving device is operable to engage in a form-fit connection with the coupling surface of the disc element for pushing the valve needle towards the closing position, characterized in that the coupling surfaces (321, 401) have an overlapping area of at least 35 % of the cross-sectional area of the cavity, in that the valve needle comprises - a first stopper fixed to the shaft at the axial end of the valve needle remote from the fluid outlet end, and - a second stopper fixed to the shaft between the first stopper and the axial end of the valve needle adjacent to the fluid outlet end, and in that the disc element - is axially displaceable relative to the shaft and positioned axially between the stoppers (38, 39), - is operable to engage in form-fit and/or force-fit connection with the first stopper for moving the shaft in the opening direction, and - is operable to engage in form-fit and/or force-fit connection with the second stopper for moving the shaft towards the closing position. - a valve body having a longitudinal axis and comprising a cavity, - a valve needle received in the cavity, operable to seal a fluid outlet end of the valve body in a closing position and axially moveable relative to the valve body away from the closing position in an opening direction for unsealing the fluid outlet end, and - a driving device positioned in the cavity for axially displacing the valve needle, the driving device being axially moveable relative to the valve body and to the valve needle, - the valve needle comprises a shaft and a disc element, - the disc element and the driving device have mutually facing and radially extending coupling surfaces (321, 401), - the driving device is configured and arranged for taking the disc element with it for displacing the valve needle in the opening direction solely by means of hydraulic interaction between the coupling surfaces (321, 401) when the driving device is displaced in the opening direction, - a first stopper fixed to the shaft at the axial end of the valve needle remote from the fluid outlet end, and - a second stopper fixed to the shaft between the first stopper and the axial end of the valve needle adjacent to the fluid outlet end, and in that the disc element - is axially displaceable relative to the shaft and positioned axially between the stoppers (38, 39), - is operable to engage in form-fit and/or force-fit connection with the first stopper for moving the shaft in the opening direction, and - is operable to engage in form-fit and/or force-fit connection with the second stopper for moving the shaft towards the closing position.