The invention relates to a device for blow moulding containers. A preform consisting of a thermoplastic material is stretched by a stretch rod after thermal conditioning inside a blow mould and is shaped, by the effects of blowing pressure, so as to form the container. A positioning specification for the stretch rod is achieved using a linear drive. The blowing pressure is generated using at least one positionable blowing gas supply. The linear drive is at least intermittently mechanically coupled to said positionable blowing gas supply and stretch rod, such that a defined motion kinematic is implemented. The coupling means and the coupled elements are constructed such that the axes of motion and the resulting force-effect axes form a common spatial axis.