A blood component measurement device (10) has a puncturing unit (18) provided inside a housing (12) and having a puncture needle (16) a button unit (20) for advancing and retreating the puncture needle (16) a contact mechanism (68) coming into contact with the skin of a person to be measured and a holder (14) for displaceably holding the puncturing unit (18). The blood component measurement device (10) also has an introduction section (94) at the substantially center of a contact member (70). After the skin is punctured by the puncture needle (16) provided at the substantially center of the mechanism (68), the introduction section (94) introduces blood to testing paper (100) when the contact member (70) of the contact mechanism (68) is displaced in a sliding manner along a guide member (72).
