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, from which the head group is accessible for maintenance activities; the head group including a transmission unit and the maintenance side 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 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, in which the first and the second structure are bound to each other, and a maintenance position, in which the first and the second structure are mobile to each other, and where the frame is mobile between a working configuration, where the connector is in the working position and the maintenance side is facing the tank and forbidden to a maintenance user, and a maintenance configuration, where the connector is in the maintenance position and the maintenance side 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, from which the head group is accessible for maintenance activities; the head group including a transmission unit and the maintenance side 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 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, in which the first and the second structure are bound to each other, and a maintenance position, in which the first and the second structure are mobile to each other, and where the frame is mobile between a working configuration, where the connector is in the working position and the maintenance side is facing the tank and forbidden to a maintenance user, and a maintenance configuration, where the connector is in the maintenance position and the maintenance side is accessible to the maintenance user.