Abstract: The catheter insertion device of the present invention includes a catheter dispenser having a catheter outlet extending from a base and a drum receptacle engaged to the base in a rotating relationship. An inlet opening in the base is coaxially aligned with the catheter outlet. A passageway extends from the inlet opening tangentially through the catheter drum to the catheter outlet. A rigid needle is disposed through the passageway so that the sharp tip extends beyond the catheter outlet. A flexible introducer catheter generally contiguously and telescopically surrounds the distal portion of the needle. The introducer catheter extends beyond the catheter outlet to a position on the needle that is proximate to the sharp tip and is operatively associated with the needle for insertion into the vein of a patient. A one way flow valve is in fluid-tight connection with the proximal end of the flexible introducer catheter.