A safety guide kit for sliding doors, for closing gaps, wherein the safety guide kit for sliding doors comprises: - a first profile attachable to a top of a sliding door, which comprises: ∘ at least two first wheels attached to the first profile by means of a first shaft, one for each first wheel, said first shafts located in the same transverse position, in a first cavity along the first profile; and ∘ at least two second wheels attached to the first profile by means of a second shaft, one for each second wheel, said second shafts located in the same transverse position along the first profile; - a second profile attachable to a wall or lintel, which comprises: ∘ at least one first surface configured so that the first wheel rolls longitudinally over it, withstanding an effort generated in said movement; and, ∘ a second surface, configured so that the second wheel of the first profile rests and rolls longitudinally over it; wherein the first profile is configured for engaging with the second profile and for moving longitudinally, once engaged, a certain length with respect to said second profile; wherein the first shaft is perpendicular to the second shaft and the first surface is perpendicular to the second surface; characterised in that the second profile comprises an intermediate section, wherein said intermediate section comprises two surfaces (261, 262) bent at 90 degrees one with respect to the other, these two surfaces (261, 262) being: - a third horizontal surface, located on an internal side of the second profile; and - a fourth vertical surface, continuous and perpendicular to the third surface, located on the internal side of the second profile; and wherein the third horizontal surface and the fourth vertical surface are configured for setting and rigidly fixing to a straight rebate surrounding a gap of the sliding door. - a first profile attachable to a top of a sliding door, which comprises: ∘ at least two first wheels attached to the first profile by means of a first shaft, one for each first wheel, said first shafts located in the same transverse position, in a first cavity along the first profile; and ∘ at least two second wheels attached to the first profile by means of a second shaft, one for each second wheel, said second shafts located in the same transverse position along the first profile; ∘ at least two first wheels attached to the first profile by means of a first shaft, one for each first wheel, said first shafts located in the same transverse position, in a first cavity along the first profile; and ∘ at least two second wheels attached to the first profile by means of a second shaft, one for each second wheel, said second shafts located in the same transverse position along the first profile; - a second profile attachable to a wall or lintel, which comprises: ∘ at least one first surface configured so that the first wheel rolls longitudinally over it, withstanding an effort generated in said movement; and, ∘ a second surface, configured so that the second wheel of the first profile rests and rolls longitudinally over it; ∘ at least one first surface configured so that the first wheel rolls longitudinally over it, withstanding an effort generated in said movement; and, ∘ a second surface, configured so that the second wheel of the first profile rests and rolls longitudinally over it; wherein the first profile is configured for engaging with the second profile and for moving longitudinally, once engaged, a certain length with respect to said second profile; wherein the first shaft is perpendicular to the second shaft and the first surface is perpendicular to the second surface; characterised in that the second profile comprises an intermediate section, wherein said intermediate section comprises two surfaces (261, 262) bent at 90 degrees one with respect to the other, these two surfaces (261, 262) being: - a third horizontal surface, located on an internal side of the second profile; and - a fourth vertical surface, continuous and perpendicular to the third surface, located on the internal side of the second profile; and - a third horizontal surface, located on an internal side of the second profile; and - a fourth vertical surface, continuous and perpendicular to the third surface, located on the internal side of the second profile; and wherein the third horizontal surface and the fourth vertical surface are configured for setting and rigidly fixing to a straight rebate surrounding a gap of the sliding door.