The present invention relates to a pneumatic de-icing device (1) for breaking up and removing an accumulated ice deposit on the outer surface (2) of an aircraft, in particular on an aircraft wing, comprising at least: an outer layer (15) for resisting the external environment, - an inner interface layer (50) to be bonded to the outer surface (2) of the aircraft, and - at least two outer intermediate layers ( 30) and inner (40) interconnected by an array of stitches (36) to define de-icing chambers (35) which can be inflated rapidly to cause a mechanical action of breaking the ice, the outer intermediate layer (30) ) comprising a layer (34) of knitted fabric, characterized in that at least one intermediate layer (20; 32) of polar elastomeric material is disposed above the knitted fabric layer (34) and immediately in contact with the couc he outer (15) and the knitted fabric layer (34).
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