<p>It is disclosed a radiant heating device comprising: a bearing structure (2), carrying at least one holding chamber (6); at least one lamp (8) having at least two terminals (11) for electric connection housed in the holding chamber (6), and a radiant portion (8a) extending externally of the holding chamber (6) along a geometric extension axis (X). At least one elastic support element (15) is in engagement with the bearing structure (2) and sealingly fitted around said lamp (8) for elastically coupling said lamp (8) to the bearing structure (2) and closing said holding chamber (6). The electric-connection terminals (11) are mutually spaced apart by an amount (D) smaller than the linear extension of the radiant portion (8a) of the lamp (8), to be detected along said geometric extension axis (X).</p>
