The invention relates to a catheter apparatus (40) including a needle guard (26). The needle guard including a base portion (44) having a needle passage (56) extending in an axial direction (A) from a proximal side (58) of said base portion through said base portion to a distal side (60) of said base portion wherein a needle shaft (28) having a principle outer profile can be movably arranged in said needle passage； first (46) and second (48) arms extending substantially in said axial direction from said distal side of said base portion, wherein said first arm has a distal region (62) and a proximal (64) region； and a distal wall (50) transversely arranged at said distal region of said first arm.
