The invention relates to portable hand-operated agricultural sprayer featuring two modular chemical containers for sequential use in the application of chemicals on agricultural crops or on weeds with application in agriculture. The sprayer is equipped with shoulder straps (3) for securing on operator's back and consists of two modular containers assembled to one another, respectively first container (1) for herbicide and second container (2) for herbicide neutralizer. On the openings of the containers (1, 2) there is a cap for herbicide (4) on which there are air valves (5, 8) and finned connectors (6, 9) to which are connected the first flexible hose for herbicide (10) and the second flexible hose for herbicide neutralizer (11) each of which is equipped with first valve (13) for herbicide and second valve (14) for herbicide neutralizer. Each of the valves (13, 14) is connected to a lug (15) and to the first tube (24) is attached second tube (25), the first tube (24) being connected via the first valve (13)
