Disposable lancing device

A disposable lancing device comprising:

• a housing;
• a spring member;
• a lancet having a skin puncture needle, the spring member and the lancet being housed within the housing such that a needle tip of the skin puncture needle is adapted to be projected out from the housing under urging of the lancet by the spring member to perform skin puncture procedure;
• and a protective cap having a needle passage hole and covering the needle tip of the skin puncture needle, the protective cap being adapted to separate from the skin puncture needle and rotate so that the needle passage hole of the protective cap is positioned on a path of projection of the skin puncture needle, and the skin puncture procedure is performed with the protective cap supported on the housing, wherein the protective cap has a cap body in which the needle passage hole is provided, and support shafts provided to the cap body and extending perpendicular to a direction of passage of the needle passage hole;
• while the housing is provided with support grooves extending in a direction of extension of the skin puncture needle, with the support shafts of the protective cap being supported in the support grooves of the housing.