The invention concerns a modular firing ground comprising a ball-arrester module, one or more intermediate modules, arranged in front of said ball-arrester module, a so-called 'firing position' module, arranged in front of the last one of said intermediate modules, each one of said modules being provided with sound-insulating means, whereby it is provided a so called 'firing controller position' module arranged next said 'firing position' module and provided with sound-insulating means, each one of said modules being provided with rapid connection means, for rapid connection with the adjacent modules, as well as with connecting means, for connecting electric and/or hydraulic lines and/or ducts of the adjacent modules, with sealing means, along the connection walls with the adjacent modules, with motion means for motion during the assembling operation of the firing ground, and with heat-insulating means, each one of said modules is realised according to the ISO standards, said firing ground being characterised in that each module provides a basis or floor wall (1), a covering wall (10) and two lateral walls (30), an end wall being provided only for end modules, each one of said walls providing in series an insulating material layer, a ballistic sheet and a coating panel.