The invention concerns a bed base slat suspension device comprising at least one gusset forming a housing for accommodating the end of a bed base slat, said device having fixing means for allowing the fixing of the gusset on a bed base frame. The device comprises a plurality of n gussets connected by means forming a connecting band, arranged so as to allow a relative movement of at least certain adjacent gussets from the point of view of the fixing of the device on the bed base frame.