Concealable caster of baggage

A concealable baggage caster comprising a caster housing dimensioned to house therein a caster of a baggage and a caster frame on which said caster is mounted, said caster housing having an open outer side and an open bottom side which are provided respectively with a folded edge to facilitate said caster housing to be fastened to a bottom edge of said baggage in conjunction with an L-shaped fastening piece provided therein with a through slot dimensioned to permit said caster to move freely therethrough, said caster housing further provided respectively in a left side wall thereof and a right side wall thereof with an elongate slot, a pivoting hole and a locating hole, said caster frame having two lugs between which said caster is mounted, with said caster frame being pivoted to said caster housing which is further provided therein with an action plate, two guiding pieces and two levers, said action plate being pivoted to said lugs of said caster frame, said two guiding pieces being pivoted to a shaft slidable along said elongate slots such that said two guiding pieces actuate said action plate, said two levers being provided respectively with a central fulcrum point fastened by a bolt shaft to said locating holes of said caster housing, said two levers being further provided jointly with a pivoting point which is fastened pivotally with one end of an inner control rod of a drag frame of said baggage.