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 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 having a principle outer profile; 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; and a stopping element, wherein said needle shaft has an enlargement between said distal section and said proximal section, characterized in that the stopping element is made of a second material different from said first material, wherein the stopping element is arranged in said needle guard and has a through-bore with a profile that is adapted to the principal outer profile of the 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 and/or the stopping element. 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 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 having a principle outer profile; 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; and a stopping element, wherein said needle shaft has an enlargement between said distal section and said proximal section, characterized in that the stopping element is made of a second material different from said first material, wherein the stopping element is arranged in said needle guard and has a through-bore with a profile that is adapted to the principal outer profile of the 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 and/or the stopping element. 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 having a principle outer profile; 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; and a stopping element, wherein said needle shaft has an enlargement between said distal section and said proximal section,