Portable spraying device comprising a container (1) with a lid (2), said lid (2) having a first vertical hole (4) that communicates with a flexible reservoir (7)containing a chemical product. Said flexible reservoir (7) being provided with a fast coupling (6) to a retention valve (9) of the vertical hole (4). An adjustable flow valve (8) is screwed in a projection of said lid (2) into said hole (4), said valve (8) operating in said hole (4) and also allowing the passage of the fluid through an horizontal hole (10) of the lid (2). The horizontal hole (10) having on one side a spur (11), to which a first hose (12), communicating with a pistol (18), is connected, and on the other side being crossed by a second vertical hole (13) having an inferior tubular extension (14) entering the conatiner (1) and a superior spur (15) to which a second hose (16) is connected. The second hose (16) being coupled to a source of pressurized water.
