Abstract: The installation for manufacturing a glass bottle (1) comprises a blank mould (10) formed of two semi-shells (10a and 10b) each comprising a cavity (11) of shape substantially corresponding to the outer shape of a semi-body of the body of the bottle, means for depositing a gob of glass (8) in the cavity (11) of each semi-shell (10a, 10b), two punches each able to be moved between a passive position and an active applied position in the cavity (11) of the corresponding semi-shell (10a, 10b) to distribute the glass within the cavity (11) and define the walls of each semi-body, and means for applying the edges of the two semi-bodies against one another by applying a determined pressure to hot-weld together these edges of the two semi-bodies and to obtain the bottle.