A fluid pressure control device comprising: a main pump configured to discharge working fluid; a pilot pump configured to discharge working fluid having a lower pressure than that of the main pump; and a control valve configured to control extending and contracting of a quick hitch cylinder for actuating a quick hitch mechanism, the control valve including: a spool configured to switch supplying and discharging of a working fluid to the quick hitch cylinder according to a movement thereof in an axial direction; a valve housing having a spool hole in which the spool is inserted slidably in the axial direction; a spring chamber provided to face one axial end of the spool, a biasing member that biases the spool is housed in the spring chamber; a pilot chamber provided to face the other axial end of the spool, wherein a pilot pressure from the pilot pump can be guided to the pilot chamber to make the spool to move against a biasing force of the biasing member; a first cylinder port configured to communicate with a rod side chamber of the quick hitch cylinder; a second cylinder port configured to communicate with an anti-rod side chamber of the quick hitch cylinder; and a main pump port communicating with the main pump and configured to communicate with the first cylinder port when pilot pressure from the pilot pump is guided to the pilot chamber and the spool moves in the axial direction against the biasing force of the biasing member; a pilot port communicating with the pilot pump and configured to communicate with the second cylinder port when no pilot pressure is guided to the pilot chamber, wherein the pilot port is formed to open on a plane (54c, 54d, 54e) of the valve housing other than a stacked plane (54a, 54b) on which an adjacent valve housing (21, 22) of an adjacent control valve can be stacked, among outer planes of the valve housing. a main pump configured to discharge working fluid; a pilot pump configured to discharge working fluid having a lower pressure than that of the main pump; and a control valve configured to control extending and contracting of a quick hitch cylinder for actuating a quick hitch mechanism, the control valve including: a spool configured to switch supplying and discharging of a working fluid to the quick hitch cylinder according to a movement thereof in an axial direction; a valve housing having a spool hole in which the spool is inserted slidably in the axial direction; a spring chamber provided to face one axial end of the spool, a biasing member that biases the spool is housed in the spring chamber; a pilot chamber provided to face the other axial end of the spool, wherein a pilot pressure from the pilot pump can be guided to the pilot chamber to make the spool to move against a biasing force of the biasing member; a first cylinder port configured to communicate with a rod side chamber of the quick hitch cylinder; a second cylinder port configured to communicate with an anti-rod side chamber of the quick hitch cylinder; and a main pump port communicating with the main pump and configured to communicate with the first cylinder port when pilot pressure from the pilot pump is guided to the pilot chamber and the spool moves in the axial direction against the biasing force of the biasing member; a pilot port communicating with the pilot pump and configured to communicate with the second cylinder port when no pilot pressure is guided to the pilot chamber, wherein the pilot port is formed to open on a plane (54c, 54d, 54e) of the valve housing other than a stacked plane (54a, 54b) on which an adjacent valve housing (21, 22) of an adjacent control valve can be stacked, among outer planes of the valve housing. a spool configured to switch supplying and discharging of a working fluid to the quick hitch cylinder according to a movement thereof in an axial direction; a valve housing having a spool hole in which the spool is inserted slidably in the axial direction; a spring chamber provided to face one axial end of the spool, a biasing member that biases the spool is housed in the spring chamber; a pilot chamber provided to face the other axial end of the spool, wherein a pilot pressure from the pilot pump can be guided to the pilot chamber to make the spool to move against a biasing force of the biasing member; a first cylinder port configured to communicate with a rod side chamber of the quick hitch cylinder; a second cylinder port configured to communicate with an anti-rod side chamber of the quick hitch cylinder; and a main pump port communicating with the main pump and configured to communicate with the first cylinder port when pilot pressure from the pilot pump is guided to the pilot chamber and the spool moves in the axial direction against the biasing force of the biasing member; a pilot port communicating with the pilot pump and configured to communicate with the second cylinder port when no pilot pressure is guided to the pilot chamber, wherein the pilot port is formed to open on a plane (54c, 54d, 54e) of the valve housing other than a stacked plane (54a, 54b) on which an adjacent valve housing (21, 22) of an adjacent control valve can be stacked, among outer planes of the valve housing.