The present invention relates to a blood lancet used in capillary blood sampling, in which the blood lancet is unitarily moulded with an elastic member for providing actuation force. In a preferred embodiment, the blood lancet (100) comprises a needle component (120) having a forward end (122) and a rearward end (124), an elastic member (140) disposed in the rearward end (124), and a detachable safety cap (160) disposed at the forward end (122), both of which are unitarily moulded to the needle component (120). In a second preferred embodiment, a two-part safety lancet is provided, comprising a blood lancet (1100) and a holder (1200), the blood lancet (1100) further comprising a needle component (1120) having a forward end and a rearward end, an elastic member (1140) disposed at the rearward end, a detachable safety cap (1160) disposed at the forward end, a pair of latch hooks (1170a) attached to the needle component (1120), a U-shape button (1180) having a pair of arms, each arm further comprises a hammer (1210a) and a reverse hook (1190a) at the end of the arm, wherein all the components, i.e. the elastic member (1140), the detachable safety cap (1160), the pair of latch hooks (1170a), the U-shape button (1180), the pair of hammers (1210a) and the pair of reverse hooks (1190a), are unitarily moulded on the needle component (1120).
