A support collar for long articles, in particular cables, pipes and/or the like, includes a sheet-like structure provided with a flat top end portion, having an opening, and two side portions perpendicular to the top end portion, each having a respective engaging element for engaging the support collar on a support plate or on a top end portion of another support collar. The side portions and the top end portion delimit an area for partially housing an article to be supported. The collar also includes a retainer for keeping the long article stably joined to the sheet-like structure, which includes at least one retaining clip provided with two gripping arms which extend inside the housing area. The gripping arms can be elastically splayed so as to engage with and retain the long article inside the housing area, pressing it elastically in directions transverse to the longitudinal extension thereof.