A structure for awnings and arbours, comprising a supporting frame, provided with respective front columns, which are designed to support guide beams for a covering canopy and for at least one movable crosspiece, which is in turn associated with an end flap of the covering canopy.At least one collection duct for rainwater being provided with at least one sealing element, in order to prevent the penetration of water, and is also provided with at least one outlet for draining the water, which extends externally from the duct and is substantially faced towards at least one respective hole, which is defined in at least one respective tubular body, which is substantially vertical and is associated with a corresponding front column. The outlet is substantially accommodated within the hole when the crosspiece is in the configuration of maximum advancement towards the front columns and the covering canopy is completely extended.