Recumbent bicycle for transporting at least one seated person, comprising: a) a central support beam , to which are attached - at least three running wheels, of which at least two rear running wheels running in parallel are arranged on the rear part of the support beam and at least one front running wheel is arranged on the front part of the support beam , - and a backrest seat , b) further a first drive device - having a crankset (6.1) having two pedals (6.1a) and a bottom bracket (6.1b), which drive at least one of the running wheels via a traction mechanism, - wherein said first drive device is configured as a drive block driven exclusively by muscle power, which is detachably attachable to the support beam , and c) characterised by a second drive device replaceable by the first drive device, - having a crankset (6.2) having two pedals (6.2a) and a bottom bracket (6.2b), which drive a traction mechanism of at least one of the running wheels , - wherein said second drive device is configured as a drive block operating with electric assistance, - is detachably attachable to the support beam - and wherein the second drive block is provided with a battery. a) a central support beam , to which are attached - at least three running wheels, of which at least two rear running wheels running in parallel are arranged on the rear part of the support beam and at least one front running wheel is arranged on the front part of the support beam , - and a backrest seat , - at least three running wheels, of which at least two rear running wheels running in parallel are arranged on the rear part of the support beam and at least one front running wheel is arranged on the front part of the support beam , - and a backrest seat , b) further a first drive device - having a crankset (6.1) having two pedals (6.1a) and a bottom bracket (6.1b), which drive at least one of the running wheels via a traction mechanism, - wherein said first drive device is configured as a drive block driven exclusively by muscle power, which is detachably attachable to the support beam , and - having a crankset (6.1) having two pedals (6.1a) and a bottom bracket (6.1b), which drive at least one of the running wheels via a traction mechanism, - wherein said first drive device is configured as a drive block driven exclusively by muscle power, which is detachably attachable to the support beam , and c) characterised by a second drive device replaceable by the first drive device, - having a crankset (6.2) having two pedals (6.2a) and a bottom bracket (6.2b), which drive a traction mechanism of at least one of the running wheels , - wherein said second drive device is configured as a drive block operating with electric assistance, - is detachably attachable to the support beam - and wherein the second drive block is provided with a battery. - having a crankset (6.2) having two pedals (6.2a) and a bottom bracket (6.2b), which drive a traction mechanism of at least one of the running wheels , - wherein said second drive device is configured as a drive block operating with electric assistance, - is detachably attachable to the support beam - and wherein the second drive block is provided with a battery. <EOS>