This paper describes the design and performance of a self-matched, transmission line pulse generator, which is capable of producing a single, high-voltage, output pulse with no subsequent reflections, regardless of the value of the load impedance. The operation of the pulse generator is loosely based on that of the self-matched, single-pulse generator described by Ishii and Yamada (1985 Rev. Sci. Instrum. 56 2116-18), but involves an improved charging and inter-component connection scheme which increases the overall efficiency of the generator and maintains a good pulse profile. The generator incorporates a number of individual transmission line modules, each constructed from lengths of URM67 coaxial cable with a transit time of 25 ns. Five modules were connected in parallel to achieve an output impedance of 5 Omega. The device is suitable for applications which require a single high-voltage and high-current pulse with a fast risetime.