Marx generator , - having at least two branches (4a,b) for delivering a respective Marx voltage (UM1,2) to a respective output terminal (6a,b) of the branch (4a,b), - each of the branches (4a,b) containing: - a plurality of capacitor stages connected in series, each having at least a first and a second voltage pole , - respective cross branches , each two adjacent capacitor stages being connected between the first voltage pole of the preceding and the second voltage pole of the succeeding capacitor stage by one of said cross branches , each of said cross branches including a spark gap , - a final capacitor stage at its output end (18a,b), one voltage pole (12a,b) of which forms the respective output pole (6a,b) of the branch (4a,b), - a first capacitor stage at its input end , one voltage pole (12a,b) of which is connected to an input pole for supplying an operating voltage (UB), - wherein at least two of the branches (4a,b) have a common firing section in which they coincide at least with respect to the first capacitor stage and a first adjacent cross branch and the input terminal , - and each of the branches (4a,b) having an ignition portion also has an individual portion (26a,b) containing at least one capacitor stage associated only therewith. - having at least two branches (4a,b) for delivering a respective Marx voltage (UM1,2) to a respective output terminal (6a,b) of the branch (4a,b), - each of the branches (4a,b) containing: - a plurality of capacitor stages connected in series, each having at least a first and a second voltage pole , - respective cross branches , each two adjacent capacitor stages being connected between the first voltage pole of the preceding and the second voltage pole of the succeeding capacitor stage by one of said cross branches , each of said cross branches including a spark gap , - a final capacitor stage at its output end (18a,b), one voltage pole (12a,b) of which forms the respective output pole (6a,b) of the branch (4a,b), - a first capacitor stage at its input end , one voltage pole (12a,b) of which is connected to an input pole for supplying an operating voltage (UB), - wherein at least two of the branches (4a,b) have a common firing section in which they coincide at least with respect to the first capacitor stage and a first adjacent cross branch and the input terminal , - and each of the branches (4a,b) having an ignition portion also has an individual portion (26a,b) containing at least one capacitor stage associated only therewith. - a plurality of capacitor stages connected in series, each having at least a first and a second voltage pole , - respective cross branches , each two adjacent capacitor stages being connected between the first voltage pole of the preceding and the second voltage pole of the succeeding capacitor stage by one of said cross branches , each of said cross branches including a spark gap , - a final capacitor stage at its output end (18a,b), one voltage pole (12a,b) of which forms the respective output pole (6a,b) of the branch (4a,b), - a first capacitor stage at its input end , one voltage pole (12a,b) of which is connected to an input pole for supplying an operating voltage (UB), - wherein at least two of the branches (4a,b) have a common firing section in which they coincide at least with respect to the first capacitor stage and a first adjacent cross branch and the input terminal , - and each of the branches (4a,b) having an ignition portion also has an individual portion (26a,b) containing at least one capacitor stage associated only therewith. <EOS>