A drive mechanism for an injection device for setting and dispensing of a dose of a medicament, the drive mechanism comprising: - an inner body fixable inside a housing of the injection device, the inner body comprising an elongated shaft extending in an axial direction (z), wherein the elongated shaft comprises an outer thread on an outer circumference, - a tubular-shaped display member having an inner thread engaged with the outer thread of the inner body, and - a dose member axially displaceable between a dose setting position and a dose dispensing position relative to the display member, characterized in that - the elongated shaft comprises a blocking structure on the outer circumference - wherein the dose member comprises at least one blocking element displaceable, pivotable or bendable in radial direction (r) between a blocking position and a release position and axially engageable with the blocking structure for inducing a radially outwardly directed deflection, displacement or pivoting of the blocking element towards the blocking position, wherein the blocking element comprises at least one protrusion extending radially inwardly to engage with the blocking structure of the inner body, - wherein the at least one protrusion comprises a beveled edge facing in distal direction to engage with a proximal edge of the blocking structure and/or wherein the proximal edge of the blocking structure is correspondingly beveled, and - wherein when in the blocking position the blocking element is engaged with the blocking structure and axially abuts with the display member to block an axial displacement of the dose member from the dose setting position towards the dose dispensing position. - an inner body fixable inside a housing of the injection device, the inner body comprising an elongated shaft extending in an axial direction (z), wherein the elongated shaft comprises an outer thread on an outer circumference, - a tubular-shaped display member having an inner thread engaged with the outer thread of the inner body, and - a dose member axially displaceable between a dose setting position and a dose dispensing position relative to the display member, characterized in that - the elongated shaft comprises a blocking structure on the outer circumference - wherein the dose member comprises at least one blocking element displaceable, pivotable or bendable in radial direction (r) between a blocking position and a release position and axially engageable with the blocking structure for inducing a radially outwardly directed deflection, displacement or pivoting of the blocking element towards the blocking position, wherein the blocking element comprises at least one protrusion extending radially inwardly to engage with the blocking structure of the inner body, - wherein the at least one protrusion comprises a beveled edge facing in distal direction to engage with a proximal edge of the blocking structure and/or wherein the proximal edge of the blocking structure is correspondingly beveled, and - wherein when in the blocking position the blocking element is engaged with the blocking structure and axially abuts with the display member to block an axial displacement of the dose member from the dose setting position towards the dose dispensing position.