The invention relates to a needle guard (26) for use in a medical device, in particular for use in a catheter device (10), including a base portion (44) having a needle passage (56) 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 wherein a needle shaft (28) having a principle outer profile can be movably arranged in said 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； and a distal wall (50) transversely arranged at said distal region of said first arm. The invention further relates to a catheter apparatus including such a needle guard and a needle.
