Described is a needle assembly (1) comprising a needle hub (1.1) adapted to mount at least one medical needle (1.2). According to the invention, the needle hub (1.1) is designed as a releasable clamping element (1.3) which interchangeably holds the medical needle (1.2) wherein the releasable clamping element (1.3) is adapted to mount the medical needle (1.2) in a non-positive locking manner and/or a positive locking manner in a holding position.
