Apparatus for spraying crops with a treating compound, including: - a tank , configured to contain the treatment compound; - a dispenser , configured to receive treatment air, including the treatment compound in atomised form, at a predetermined treatment pressure; - a head group , configured to draw air from an external environment, mix it with the treating compound and pump it to the dispenser , the head group including a maintenance side (LM), from which the head group is accessible for maintenance activities; the head group including a transmission unit and the maintenance side (LM) showing the transmission unit , - a frame , configured to support the tank , the dispenser and the head group and including a first structure , on which is placed the tank , and a second structure , on which are placed the dispenser and the head group ; the first and the second structure being placed side by side along a direction of advance (A) along which the apparatus advances between crops, characterized by the fact that the frame includes a connector , configured to connect the first structure to the second structure and mobile between a working position (PL), in which the first and the second structure are bound to each other, and a maintenance position (PM), in which the first and the second structure are mobile to each other, and where the frame is mobile between a working configuration (CL), where the connector is in the working position (PL) and the maintenance side (LM) is facing the tank and forbidden to a maintenance user, and a maintenance configuration (CM), where the connector is in the maintenance position (PM) and the maintenance side (LM) is accessible to the maintenance user. - a tank , configured to contain the treatment compound; - a dispenser , configured to receive treatment air, including the treatment compound in atomised form, at a predetermined treatment pressure; - a head group , configured to draw air from an external environment, mix it with the treating compound and pump it to the dispenser , the head group including a maintenance side (LM), from which the head group is accessible for maintenance activities; the head group including a transmission unit and the maintenance side (LM) showing the transmission unit , - a frame , configured to support the tank , the dispenser and the head group and including a first structure , on which is placed the tank , and a second structure , on which are placed the dispenser and the head group ; the first and the second structure being placed side by side along a direction of advance (A) along which the apparatus advances between crops, characterized by the fact that the frame includes a connector , configured to connect the first structure to the second structure and mobile between a working position (PL), in which the first and the second structure are bound to each other, and a maintenance position (PM), in which the first and the second structure are mobile to each other, and where the frame is mobile between a working configuration (CL), where the connector is in the working position (PL) and the maintenance side (LM) is facing the tank and forbidden to a maintenance user, and a maintenance configuration (CM), where the connector is in the maintenance position (PM) and the maintenance side (LM) is accessible to the maintenance user. <EOS>