Abstract: The fluid inlet device for an apparatus, in particular for a column, has an inflow stub for the supply of a fluid which can be single phase or multi-phase. A distribution chamber adjoins the inflow stub and has guide lamellae arranged at at least one open side of the chamber by means of which a fluid can be distributed into the column on curved paths. Each guide lamella is mounted to the wall panels of the distribution chamber via plug connections. The stability of the construction is established by fixing one or all plug connections to the respective wall panel by welding, nut and bolt assemblies, snap fitting and/or wedges.