Citrus juicer machine, comprising a fruit feeder (1), means for cutting and squeezing the fruits, and a tray for collecting peels (8), the means for cutting and squeezing comprising a fruit receiving cup (3) , which is located below the fruit feeder (1)； means for causing the rotation of the cup (3) between a vertical position of reception of a fruit and an inverted position； a tilting horizontal blade (4) facing the rotating path of the cup (3), for cutting the fruit in an upper half and a lower half； a retaining stop (5) of the upper half of the fruit； a ramp (7) to support the lower half of the fruit during the rotation of the cup (3) from its vertical position to the inverted position； a juicer ball (6) located below the cup (3)； and means for moving vertically and synchronously the cup (3) in an inverted position and the ramp (7), from the upper inverted position of said cup to a lower position where the lower half of the fruit housed in said cup is pressed ( 3) against the juicer ball (6), said citrus juicer machine characterized in that the means for causing the rotation of the cup comprise a rotating horizontal axis (9), on which said cup (3) is mounted, a pinion ( 10) integral with said shaft (9), and a vertical rack (11) movable in the vertical direction, with which said pinion (10) engages, and by which the blade (4) is mounted on a horizontal axis (21), on which it can swing transversely between positions of minimum and maximum inclination, whose axis (21) is carried by a probe (22) that is retained, with the blade in the position of minimum inclination, through a releasable rear stop (23 ) and is driven by a resor te (24) towards the position of maximum inclination of the blade (4), said probe receiving (22) the action of the vertical plate (12) of the rack, when said plate (12) reaches the highest point of its trajectory vertical, to cause the tilting of the blade (4) from the position of maximum inclination to that of minimum inclination.Máquina expri
