A catheter apparatus, including: a catheter tube; a catheter hub; a needle having a needle tip, a needle shaft and a needle hub, wherein said needle shaft has a distal section and a proximal section, with at least the proximal section having a principal outer profile, and wherein said needle shaft has an enlargement between said distal section and said proximal section; and a needle guard including: a base portion made of a first material and having a needle passage extending in an axial direction from a proximal side of said base portion through said base portion to a distal side of said base portion for movably receiving said needle shaft, wherein said enlargement has an increased outer profile a dimension of which is larger than a maximum dimension of the profile of the needle passage; first and second arms (46, 48) extending substantially in said axial direction from said distal side of said base portion, wherein said first arm has a distal region and a proximal region; a distal wall transversely arranged at said distal region of said first arm; characterized in that a stopping element made of a second material different from said first material is arranged in said needle guard, wherein said stopping element has a disk-like shape and a through-bore which has a circular cross section with its diameter being larger than the principal diameter of the proximal section of the needle shaft and smaller than a maximum dimension of said enlargement. a catheter tube; a catheter hub; a needle having a needle tip, a needle shaft and a needle hub, wherein said needle shaft has a distal section and a proximal section, with at least the proximal section having a principal outer profile, and wherein said needle shaft has an enlargement between said distal section and said proximal section; and a needle guard including: a base portion made of a first material and having a needle passage extending in an axial direction from a proximal side of said base portion through said base portion to a distal side of said base portion for movably receiving said needle shaft, wherein said enlargement has an increased outer profile a dimension of which is larger than a maximum dimension of the profile of the needle passage; first and second arms (46, 48) extending substantially in said axial direction from said distal side of said base portion, wherein said first arm has a distal region and a proximal region; a distal wall transversely arranged at said distal region of said first arm; characterized in that a stopping element made of a second material different from said first material is arranged in said needle guard, wherein said stopping element has a disk-like shape and a through-bore which has a circular cross section with its diameter being larger than the principal diameter of the proximal section of the needle shaft and smaller than a maximum dimension of said enlargement. a base portion made of a first material and having a needle passage extending in an axial direction from a proximal side of said base portion through said base portion to a distal side of said base portion for movably receiving said needle shaft, wherein said enlargement has an increased outer profile a dimension of which is larger than a maximum dimension of the profile of the needle passage; first and second arms (46, 48) extending substantially in said axial direction from said distal side of said base portion, wherein said first arm has a distal region and a proximal region; a distal wall transversely arranged at said distal region of said first arm; characterized in that a stopping element made of a second material different from said first material is arranged in said needle guard, wherein said stopping element has a disk-like shape and a through-bore which has a circular cross section with its diameter being larger than the principal diameter of the proximal section of the needle shaft and smaller than a maximum dimension of said enlargement.