A liftable bed of a recreational vehicle, comprising: - two uprights integral with said recreational vehicle; - a base slidingly engaged with said two uprights and movable between at least a first position (BB) lowered and at least a second position (AA) raised, said base comprising a frame closed in a ring; - a slat carrier device configured to be constrained to said frame of said base ; - a plurality of slats configured to be constrained to said slat carrier device , said bed being characterized in that said frame comprises a first side wall having a guide defined by a first and a second protrusion, separated from each other, which extend perpendicularly from said first side wall , and in that said slat carrier device comprises: - a support base comprising a surface of external extension configured to arrange in support within said guide of said frame , said surface of external extension having a substantially triangular cross-section; - at least one blocking element , integral with said support base , and configured to engage one of said slats at a determined position along said guide of said frame , and to engage said device to said guide , said blocking element comprising a surface of external extension having a substantially C-shaped section configured to fit at least partially within said guide of said frame . - two uprights integral with said recreational vehicle; - a base slidingly engaged with said two uprights and movable between at least a first position (BB) lowered and at least a second position (AA) raised, said base comprising a frame closed in a ring; - a slat carrier device configured to be constrained to said frame of said base ; - a plurality of slats configured to be constrained to said slat carrier device , said bed being characterized in that said frame comprises a first side wall having a guide defined by a first and a second protrusion, separated from each other, which extend perpendicularly from said first side wall , and in that said slat carrier device comprises: - a support base comprising a surface of external extension configured to arrange in support within said guide of said frame , said surface of external extension having a substantially triangular cross-section; - at least one blocking element , integral with said support base , and configured to engage one of said slats at a determined position along said guide of said frame , and to engage said device to said guide , said blocking element comprising a surface of external extension having a substantially C-shaped section configured to fit at least partially within said guide of said frame . - a support base comprising a surface of external extension configured to arrange in support within said guide of said frame , said surface of external extension having a substantially triangular cross-section; - at least one blocking element , integral with said support base , and configured to engage one of said slats at a determined position along said guide of said frame , and to engage said device to said guide , said blocking element comprising a surface of external extension having a substantially C-shaped section configured to fit at least partially within said guide of said frame . <EOS>