A catheter apparatus, including: a catheter tube; a catheter hub; a needle having an outer diameter and 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 a needle shaft having a principal 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 characterised in that a stopping element made of a second material different from said first material, which is arranged in said base portion of the needle guard or at the distal side of the base portion between the first arm and the second arm and has a through-bore with a profile that is adapted to the principal outer profile of the needle shaft, wherein said needle shaft has an enlargement between said distal section and said proximal section, said enlargement having 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 an outer diameter and 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 a needle shaft having a principal 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 characterised in that a stopping element made of a second material different from said first material, which is arranged in said base portion of the needle guard or at the distal side of the base portion between the first arm and the second arm and has a through-bore with a profile that is adapted to the principal outer profile of the needle shaft, wherein said needle shaft has an enlargement between said distal section and said proximal section, said enlargement having 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 a needle shaft having a principal 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 characterised in that a stopping element made of a second material different from said first material, which is arranged in said base portion of the needle guard or at the distal side of the base portion between the first arm and the second arm and has a through-bore with a profile that is adapted to the principal outer profile of the needle shaft, wherein said needle shaft has an enlargement between said distal section and said proximal section, said enlargement having 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.