- Electric air heating device of the type comprising: - a housing delimited by a wall with an inner face and an outer face; - at least one resistive ribbon disposed in an inner space of the housing adapted to heat air of a debit of air flowing through the housing and to form a debit of heated air; - a tightening device cooperating with the inner face and with the outer face of said wall to fasten the resistive ribbon to said wall, said tightening device comprising at least: ∘ a tightening shaft extending across said wall, and ∘ a tightening washer of the tightening device, facing the outer face of said wall and in electrically conductive contact with the tightening shaft; - a cut-off for opening an electric circuit supplying said at least one resistive ribbon with electric current and interrupting the heating of said at least one resistive ribbons in a state of the electric air heating device, named overheating state, wherein the temperature of the wall exceeds a predetermined temperature; said cut-off comprising a fuse disposed in electricity conductive contact with the tightening washer and with said wall; characterized in that the tightening device comprises at least one tightening spacer ▪ tightened longitudinally between the tightening washer and said wall, ▪ tightening of the resistive ribbon and said wall on each other at least in said overheating state, and ▪ providing with no electric conducting contact between the tightening washer and said wall. - a housing delimited by a wall with an inner face and an outer face; - at least one resistive ribbon disposed in an inner space of the housing adapted to heat air of a debit of air flowing through the housing and to form a debit of heated air; - a tightening device cooperating with the inner face and with the outer face of said wall to fasten the resistive ribbon to said wall, said tightening device comprising at least: ∘ a tightening shaft extending across said wall, and ∘ a tightening washer of the tightening device, facing the outer face of said wall and in electrically conductive contact with the tightening shaft; ∘ a tightening shaft extending across said wall, and ∘ a tightening washer of the tightening device, facing the outer face of said wall and in electrically conductive contact with the tightening shaft; - a cut-off for opening an electric circuit supplying said at least one resistive ribbon with electric current and interrupting the heating of said at least one resistive ribbons in a state of the electric air heating device, named overheating state, wherein the temperature of the wall exceeds a predetermined temperature; said cut-off comprising a fuse disposed in electricity conductive contact with the tightening washer and with said wall; characterized in that the tightening device comprises at least one tightening spacer ▪ tightened longitudinally between the tightening washer and said wall, ▪ tightening of the resistive ribbon and said wall on each other at least in said overheating state, and ▪ providing with no electric conducting contact between the tightening washer and said wall. ▪ tightened longitudinally between the tightening washer and said wall, ▪ tightening of the resistive ribbon and said wall on each other at least in said overheating state, and ▪ providing with no electric conducting contact between the tightening washer and said wall.