Device for the blocking of the burner particularly in the plans of baking of you sew some, comprising an of campania of support of the diffuser and to it associated inferiorly a gallery for the connection to the feeding net; it dictates of campania previewing : - a ring-like center for the acceptation of a packing of estate, obtained in correspondence of the base to contact of the plan and arranged perimetralmente outside of means for the anchorage of the same one to the flat saying; - average for the anchorage of the of campania to the plan of baking, being constituted from a key of azionabile fermo manually, than which extension of a portion of base is engaged on a part of the of campania to of under of the support plan.