Abstract: A skin-penetrating medical object holder can effectively suppress detachment of a medical skin-penetrating object and living body tissue due to external forces, and therefore can prevent infections from occurring from the outset. The skin-penetrating medical object holder includes a belt-like holder main body that is wound around a living body and a penetrating object holding part that is disposed on the holder main body and holds a medical skin-penetrating object that passes through the skin of the living body. The penetrating object holding part is constructed so as to guide, in a state where the holder main body has been wound around the living body, the medical skin-penetrating object along a length direction of the holder main body.