Drug delivery device comprising: - a syringe with a body (5.1) from which a needle extends, - an inner sheath adapted to be movable between a retracted position in which the needle projects beyond a distal end of the inner sheath and an extended position in which the needle is covered by the inner sheath; - a support sheath adapted to hold the body (5.1) and to hold the inner sheath in the retracted position as well as in the extended position, - a piston rod comprising a piston, wherein the piston rod is movable from a first position in which the piston rod is retracted to a second position wherein a drug delivery process is finished, and - an actuation head, wherein - the actuation head is coupled on a proximal end of the piston rod, - the support sheath comprises a proximal section (2.2), wherein the proximal section (2.2) of the support sheath and the actuation head comprise corresponding indicators providing a visible feedback when the piston rod is in the second position, characterized in that the corresponding indicators are designed as coloured markings, wherein the markings are either formed as: - fragmented markings and/or circumferential markings, whereby the actuation head comprises a number of fragmented markings and at least one circumferential marking and the support sheath comprises at least one circumferential marking, or whereby the actuation head and the support sheath respectively comprise at least one circumferential marking or respectively a number of fragmented markings, or - a material colouration, whereby the material of the support sheath is designed at least section-wise as a coloured translucent material or as an optically intransparent coloured material or as a transparent material, whereby the degree of transparency or colour of the translucent material and/or intransparent material of the support sheath is substantially equal to the degree of transparency or colour of the material of the actuation head. - a syringe with a body (5.1) from which a needle extends, - an inner sheath adapted to be movable between a retracted position in which the needle projects beyond a distal end of the inner sheath and an extended position in which the needle is covered by the inner sheath; - a support sheath adapted to hold the body (5.1) and to hold the inner sheath in the retracted position as well as in the extended position, - a piston rod comprising a piston, wherein the piston rod is movable from a first position in which the piston rod is retracted to a second position wherein a drug delivery process is finished, and - an actuation head, - the actuation head is coupled on a proximal end of the piston rod, - the support sheath comprises a proximal section (2.2), - fragmented markings and/or circumferential markings, whereby the actuation head comprises a number of fragmented markings and at least one circumferential marking and the support sheath comprises at least one circumferential marking, or whereby the actuation head and the support sheath respectively comprise at least one circumferential marking or respectively a number of fragmented markings, or - a material colouration, whereby the material of the support sheath is designed at least section-wise as a coloured translucent material or as an optically intransparent coloured material or as a transparent material, whereby the degree of transparency or colour of the translucent material and/or intransparent material of the support sheath is substantially equal to the degree of transparency or colour of the material of the actuation head.