Multi-stage transmission comprising four gear sets, shafts and shift elements. Sun of first set is connected to eighth shaft connected to sun of second set and is connectable, via third clutch, to drive shaft. Drive shaft is connectable, via first clutch, to fourth shaft connected to ring of first set and is couplable, via first brake, to the housing. Drive shaft is connectable, via second clutch, to seventh shaft connected to carrier of second set and being connectable, via fourth clutch, to third shaft which is connectable to ring of third set. Sixth shaft is connected to ring of second set and carrier of fourth set. Sun of third set is coupled to housing. Fifth shaft is connected to carrier of first set and sun of fourth set and is couplable, via second brake, to housing. Output shaft is connected to carrier of third set and ring of fourth set.