A guide system for a piece of furniture intended to be mounted in translation on a wall of a recreational vehicle along a line of translation, said system comprising: - a guide rail intended to be mounted integrally on the wall of the recreational vehicle, the guide rail being made from a rigid material and comprising a hollow, generally tubular body extending along a longitudinal extension line coincident with the line of translation, the body comprising a groove extending along the longitudinal extension line and giving access to the interior of the body along a first transverse direction, substantially perpendicular to the longitudinal extension line, - a guide shoe intended to be mounted on the piece of furniture and designed to be slidably mounted on the guide rail along the longitudinal extension line, so as to guide the piece of furniture in translation along the longitudinal extension line, when the guide shoe is integrally mounted on the piece of furniture, the guide system being characterised in that the guide shoe is made from a flexible material and in that said guide shoe comprises: - a first pair of fins (15a, 15b) designed to slide along a first longitudinal edge of the groove of the guide rail, one fin, referred to as the inner fin, of the first pair being located inside the body of the guide rail, the other fin, referred to as the outer fin, of the first pair being located outside the body of the guide rail, when the guide shoe is slidably mounted on the guide rail, the fins (15a, 15b) of the first pair being furthermore capable of elastically deforming in bending along the first transverse direction, when the guide shoe is slidably mounted on the guide rail and when it slides along said guide rail, and - a second pair of fins (21a, 21b) designed to slide along a second longitudinal edge of the groove of the guide rail, arranged opposite the first longitudinal edge, one fin, referred to as the inner fin, of the second pair being located inside the body of the guide rail, the other fin, referred to as the outer fin, of the second pair being located outside the body of the guide rail, when the guide shoe is mounted so as to slide on the guide rail, the fins (21a, 21b) of the second pair also being capable of elastically deforming in bending along the first transverse direction, when the guide shoe is slidably mounted on the guide rail and slides along said guide rail. - a guide rail intended to be mounted integrally on the wall of the recreational vehicle, the guide rail being made from a rigid material and comprising a hollow, generally tubular body extending along a longitudinal extension line coincident with the line of translation, the body comprising a groove extending along the longitudinal extension line and giving access to the interior of the body along a first transverse direction, substantially perpendicular to the longitudinal extension line, - a guide shoe intended to be mounted on the piece of furniture and designed to be slidably mounted on the guide rail along the longitudinal extension line, so as to guide the piece of furniture in translation along the longitudinal extension line, when the guide shoe is integrally mounted on the piece of furniture, - a first pair of fins (15a, 15b) designed to slide along a first longitudinal edge of the groove of the guide rail, one fin, referred to as the inner fin, of the first pair being located inside the body of the guide rail, the other fin, referred to as the outer fin, of the first pair being located outside the body of the guide rail, when the guide shoe is slidably mounted on the guide rail, the fins (15a, 15b) of the first pair being furthermore capable of elastically deforming in bending along the first transverse direction, when the guide shoe is slidably mounted on the guide rail and when it slides along said guide rail, and - a second pair of fins (21a, 21b) designed to slide along a second longitudinal edge of the groove of the guide rail, arranged opposite the first longitudinal edge, one fin, referred to as the inner fin, of the second pair being located inside the body of the guide rail, the other fin, referred to as the outer fin, of the second pair being located outside the body of the guide rail, when the guide shoe is mounted so as to slide on the guide rail, the fins (21a, 21b) of the second pair also being capable of elastically deforming in bending along the first transverse direction, when the guide shoe is slidably mounted on the guide rail and slides along said guide rail.