The 1st Cavalry (Horse Guards) Regiment "Grenadiers" (Spanish: Regimiento Escolta Presidencial n.º 1 «Granaderos») is the senior cavalry regiment of the Chilean Army, which serves as the Horse Guards unit providing the ceremonial escort in parades and ceremonies to the President of Chile, the Supreme Commander of the Chilean Armed Forces.

As part of the wide reorganization of the Army following that war the Grenadiers were reorganized in the early 1900s, co-sharing the duties of the presidential horse guard with the then Cavalry Regiment "Mounted Rifles" and the Army 5th Carabineer Regiment, the predecessor of the current Carabineros de Chile, with the regiment forming a dismounted ceremonial squadron armed in the same manner as Prussian dragoons of the era, a duty it would later share with the Army Mounted Ceremonial Troop, wearing Garde de Corps styled uniforms, and the Army Cavalry School Mounted Regiment, which was dressed in the manner of the cuirassiers, alongside the current Carabineros School.

In 1932 the Grenadiers were relegated to being only the travelling escort, as the Carabineros officially raised the then 200-man La Moneda Palace Guard that year as the permanent presidential security unit.

In 1999, the regiment was relocated to its current stables in Camp San Isidro in the western city of Quillota, Valparaíso Region, wherein it was reassigned the duties of being the travelling escort to the President, merging the Mounted Ceremonial Troop to it.

Alongside being the travelling escort unit, it maintains guards at the Plaza de la Ciudadanía in Santiago monthly for flag raising ceremonies held there.