The present invention relates to a Resuscitation device (100) comprising a compressible chamber (110) for providing a tidal volume of oxygen-containing gas to a patient, with an inlet (111) for admission of the oxygen-containing gas into the compressible chamber (110), and an outlet (112) for directing the oxygen containing gas to a patient, the compressible chamber being compressible by means of a lever mechanism (120) comprising at least one pivotable lever (122), the lever mechanism (120) being actable by means of a cam mechanism (130) comprising a cam pivotable about a cam axis (132), wherein the tidal volume of the compressible chamber is adjustable by means of moving the compressible chamber and/or by moving the cam axis (132) of the cam (130) with respect to the at least one lever (122), and/or by moving the lever (122) with respect to the-compressible chamber.
