A blood lancing device (2) includes a housing unit (3) and a cap (4). When the cap (4) is disposed at an initial position, a second drive element (72) is blocked by a first drive element (71) from forward movement relative to the first drive element (71). When the cap (4) is moved from the initial position to a retracted position, the first drive element (71) pushes the second drive element (72) so that the second drive element (72) is deviated from the first drive element (71) when a holder (5) holding a lancet (10) is moved to a trigger position, thereby allowing for a high speed movement of the holder (5) from the trigger position to a pricking position by virtue of biasing action of a first biasing member (61).
