A device for manufacturing foam cushions in particular for packaging purposes, said device comprising a foil supply station and a foam dispensing station, said foil supply station being provided for supplying to said foam dispensing station a foil material, having a first and a second side wall joining each other at a common first border and positioned so as to delimit an inner space accessible by an opening applied in a second border, said foam dispensing station comprising first retaining means, provided for retaining said second border, said foam dispensing station further comprising a dispensing member, provided for penetrating through said opening and supplying a foaming substance into said inner space, said device further comprising transport means, provided for transporting said foil material through said dispensing station towards a welding station, said foam dispensing station further comprises slot shaping means mounted offset and downwards from said first retaining means in such a manner as to form a slot to be crossed by an upper stroke of said foil material, said dispensing member being oriented with respect to said slot shaping means when applied into said opening, in such a manner, as to output said foaming substance towards an upper surface of said slot shaping means.