The syringe has a cylinder having an inner surface that defines an internal bore, a plunger provided in the internal bore of the cylinder, and a dose divider provided in the plunger. The dose divider has a first end, a first abutment surface, and a second abutment surface. The first abutment surface is located at a distance from the first end when viewed in the axial direction by a first axial distance, and the second abutment surface is located from the first end when viewed in the axial direction. Located at a second axial distance apart. The second abutment surface is spaced a first radial distance from the longitudinal axis of the plunger, the first radial distance being from the longitudinal axis of the cylinder and near the proximal end of the cylinder. It is larger than the radial dimension to the inner surface of the positioned cylinder.シリンジが内部ボアを画定する内面を備えた筒と、筒の内部ボア内に設けられたプランジャと、プランジャに設けられた投与量分割器とを有する。投与量分割器は、第１の端と、第１の当接面と、第２の当接面とを有する。第１の当接面は、軸方向に見て第１の端から第１の軸方向距離だけ間隔を置いて位置し、第２の当接面は、軸方向に見て第１の端から第２の軸方向距離だけ間隔を置いて位置する。第２の当接面は、プランジャの長手方向軸線から第１の半径方向距離だけ間隔を置いて位置し、第１の半径方向距離は、筒の長手方向軸線から筒の近位端の近くに位置する筒の内面までの半径方向寸法よりも大きい。
