Machine for harvesting fruit, which comprises: - a support structure intended to be abutted against the ground; - at least one collection box, which is positioned on said support structure, is provided with an internal space and comprises a bottom wall placed to close the bottom of said internal space, a lateral wall extended from the bottom wall to close the side of said internal space, and an upper edge delimiting an access opening to said internal space; - a belt conveyor mounted on said support structure and extended between an inlet end and an outlet end from which multiple pieces of fruit are susceptible of being deposited in the internal space of said collection box; - movement means operatively connected to said belt conveyor and arranged for moving said belt conveyor between a first operative configuration, in which the outlet end of said belt conveyor is arranged in the internal space of said collection box at the bottom wall of said collection box, and a second operative configuration, in which the outlet end of said belt conveyor is arranged at the access opening of said collection box; said belt conveyor comprising: - a first movable frame extended along a first extension direction between said inlet end and a first connection end; - a second movable frame extended along a second extension direction between said outlet end and a second connection end constrained to the first connection end of said first movable frame; said movement means being arranged for driving, between said first operative configuration and said second operative configuration of said belt conveyor, at least said second movable frame to be moved according to at least one trajectory having at least one vertical component and at least one horizontal component; wherein the second connection end of said second movable frame is rotatably constrained to the first connection end of said first movable frame around a first axis; said movement means being arranged for driving said second movable frame to rotate around said first axis between said first operative configuration and said second operative configuration of said belt conveyor; said machine being characterized in that it comprises a support frame fixed to said support structure and carrying said first movable frame in a slidingly mounted manner to guide the movement of said first movable frame during the movement of said belt conveyor between said first operative configuration and said second operative configuration. - a support structure intended to be abutted against the ground; - at least one collection box, which is positioned on said support structure, is provided with an internal space and comprises a bottom wall placed to close the bottom of said internal space, a lateral wall extended from the bottom wall to close the side of said internal space, and an upper edge delimiting an access opening to said internal space; - a belt conveyor mounted on said support structure and extended between an inlet end and an outlet end from which multiple pieces of fruit are susceptible of being deposited in the internal space of said collection box; - movement means operatively connected to said belt conveyor and arranged for moving said belt conveyor between a first operative configuration, in which the outlet end of said belt conveyor is arranged in the internal space of said collection box at the bottom wall of said collection box, and a second operative configuration, in which the outlet end of said belt conveyor is arranged at the access opening of said collection box; - a first movable frame extended along a first extension direction between said inlet end and a first connection end; - a second movable frame extended along a second extension direction between said outlet end and a second connection end constrained to the first connection end of said first movable frame; said movement means being arranged for driving, between said first operative configuration and said second operative configuration of said belt conveyor, at least said second movable frame to be moved according to at least one trajectory having at least one vertical component and at least one horizontal component; wherein the second connection end of said second movable frame is rotatably constrained to the first connection end of said first movable frame around a first axis; said movement means being arranged for driving said second movable frame to rotate around said first axis between said first operative configuration and said second operative configuration of said belt conveyor; said machine being characterized in that it comprises a support frame fixed to said support structure and carrying said first movable frame in a slidingly mounted manner to guide the movement of said first movable frame during the movement of said belt conveyor between said first operative configuration and said second operative configuration.