Valve assembly with a guiding element and fluid injector

A valve assembly (3) comprising a valve body (5), a valve needle (7) and a first guiding element (19) for axially guiding the valve needle (7) is disclosed. The first guiding element (19) is bottle shaped and is axially deformable at least in part. It is fixedly coupled to the valve needle (7) in a bottle neck section (21) of the first guiding element (19). And it is coupled to the wall (15) of the valve body (5) in an axial end section (23) of the first guiding element (19) remote from the bottle neck section (21). In this way, an axial displacement of the valve needle (7) away from the closing position results in a widening of an outer shape of the first guiding element (19) at least in a fixation section (25) to press it against the wall (15) of the valve body (5). Further, a fluid injector (1) with the valve assembly (3) is disclosed.