An inserter for placing an inserter head, the inserter head comprising: i) a base (1, 2) comprising a lower side which can be placed on organic tissue, ii) an insertion means which is movably mounted by the base and can be inserted into the tissue, iii) wherein the insertion means can be moved relative to the base from a protective position, in which a free end of the insertion means is set back behind the lower side of the base, to an insertion position in which the free end protrudes beyond the lower side, iv) a handle projecting from the base and having a first handle component (10, 11) and a second handle component movable relative to the base and the first handle component; and v) a coupling (8, 18, 42, 44) that transmits a movement of the second handle component into a movement of the insertion means, the inserter comprising: a) an inserter casing (20, 30) accommodating a holding means for an inserter head to be placed, and a drive for the insertion head, the drive comprising an advancing element (22, 32) arranged in the inserter casing linearly movable in and counter to an advancing direction, and a force generator (23, 33) acting on the advancing element in the advancing direction, wherein the force generator comprises two pairs of legs (24, 34) connected to one another via a joint, the two pairs of legs are arranged symmetrically with respect to the advancing direction, each of the two pairs of legs is suspended in a rotary joint (25, 35) which is stationary with respect to the inserter casing, the two legs of the respective pair of legs are rotatably connected to one another in a free rotary joint (26, 36), and that leg of each pair of legs which faces away from the stationary joint is connected to the advancing element in each case in a further rotary joint (27, 37), and b) means for moving the insertion means of the insertion head into an insertion position, characterized in that the means are an activating member (21, 31) forming a guiding cam (21a, 31a) which is inclined with respect to the advancing direction, wherein - the activating member is movably connected to the inserter casing (20, 30) in and counter to the advancing direction, - the activating member (21, 31) and the insertion head form a joint, and - the joint elements (41a, 41b, 12a) of the joint are formed by the guiding cam (21a, 31a) and by an engaging element (12a, 41a) formed by the movable handle component, wherein the guiding cam (21a, 31a) slides over the engaging element (12a, 41a). i) a base (1, 2) comprising a lower side which can be placed on organic tissue, ii) an insertion means which is movably mounted by the base and can be inserted into the tissue, iii) wherein the insertion means can be moved relative to the base from a protective position, in which a free end of the insertion means is set back behind the lower side of the base, to an insertion position in which the free end protrudes beyond the lower side, iv) a handle projecting from the base and having a first handle component (10, 11) and a second handle component movable relative to the base and the first handle component; and v) a coupling (8, 18, 42, 44) that transmits a movement of the second handle component into a movement of the insertion means, a) an inserter casing (20, 30) accommodating a holding means for an inserter head to be placed, and a drive for the insertion head, the drive comprising an advancing element (22, 32) arranged in the inserter casing linearly movable in and counter to an advancing direction, and a force generator (23, 33) acting on the advancing element in the advancing direction, wherein the force generator comprises two pairs of legs (24, 34) connected to one another via a joint, the two pairs of legs are arranged symmetrically with respect to the advancing direction, each of the two pairs of legs is suspended in a rotary joint (25, 35) which is stationary with respect to the inserter casing, the two legs of the respective pair of legs are rotatably connected to one another in a free rotary joint (26, 36), and that leg of each pair of legs which faces away from the stationary joint is connected to the advancing element in each case in a further rotary joint (27, 37), and b) means for moving the insertion means of the insertion head into an insertion position, - the activating member is movably connected to the inserter casing (20, 30) in and counter to the advancing direction, - the activating member (21, 31) and the insertion head form a joint, and - the joint elements (41a, 41b, 12a) of the joint are formed by the guiding cam (21a, 31a) and by an engaging element (12a, 41a) formed by the movable handle component, wherein the guiding cam (21a, 31a) slides over the engaging element (12a, 41a).