An electron beam writing apparatus includes an electron gun system to emit an electron beam, a height adjustment unit, arranged at the downstream side compared to the electron gun system with respect to the optical axis direction, to variably adjust a height position of the electron gun system, an electron lens, arranged at the downstream side compared to the height adjustment unit with respect to the optical axis direction, to converge the electron beam, a lens control unit to control, for each variably adjusted and changed height position of the electron gun system, the electron lens such that the electron beam forms a crossover at a predetermined position, and an objective lens, arranged at the downstream side compared to the electron lens with respect to the optical axis direction, to focus the electron beam having passed the electron lens.