A tile-leveling spacer device comprising: a base having a lower surface and an opposite upper surface, wherein the upper surface comprises two opposite side portions with respect to a central portion and each defining a planar surface arranged at a second distance from the lower surface, wherein the second distance is less than the first distance; a spacer bridge defining with the base a through opening adapted for being crossed by a pressing wedge, wherein: each leg of the bridge is connected to the base at a respective side portion of the base in a breakable manner through a predetermined fracture line arranged at a third distance from the intermediate lower surface with respect to the first distance and to the second distance, each side portion has a longitudinal axis parallel to the crossing direction of the pressing wedge and extends for the entire length of the base along such a crossing direction, and the second distance is comprised between 20% and 90% of the first distance.