A clutch control device for a four-wheel drive vehicle mounted in a four-wheel drive vehicle, in which, of the left and right front wheels (6, 7) and the left and right rear wheels (19, 20), one pair is set as the main drive wheels, which are connected to a drive source, and the other pair is set as the auxiliary drive wheels, which are connected to the drive source via a clutch, wherein: a dog clutch provided at a drive branch position from the main drive wheels to the auxiliary drive wheels, which separates a system for transmitting drive force to the auxiliary drive wheels from a system for transmitting drive force to the main drive wheels by releasing the clutch; a friction clutch provided in a downstream position of the dog clutch, comprising an input-side member that is connected to the dog clutch and an output-side member that is connected to the auxiliary drive wheels, which allocates a portion of the drive force from the drive source to the auxiliary drive wheels in accordance with a clutch engagement capacity, and is housed in a clutch case; and a clutch controller that carries out an engagement and disengagement control of the dog clutch and an engagement and disengagement control of the friction clutch, wherein the clutch case comprises a clutch chamber that houses the friction clutch, an oil chamber that is partitioned from the clutch chamber by a partition wall, an oil flow channel that places the clutch chamber in communication with the oil chamber and conveys lubrication oil from the clutch chamber to the oil chamber by a centrifugal force that is generated by a rotation of at least the output side member of the friction clutch, and a passage opening provided in the partition wall that can be opened and closed, and characterised in that, when a disconnected, two-wheel drive mode which releases the dog clutch and the friction clutch is selected, the clutch controller closes the passage opening and stores the lubrication oil in the oil chamber; after selecting the disconnected, two-wheel drive mode, when oil stirring conditions are met, in which the temperature of the lubrication oil in the clutch chamber is elevated, the clutch controller opens the passage opening and causes the lubrication oil to flow from the oil chamber to the clutch chamber. a dog clutch provided at a drive branch position from the main drive wheels to the auxiliary drive wheels, which separates a system for transmitting drive force to the auxiliary drive wheels from a system for transmitting drive force to the main drive wheels by releasing the clutch; a friction clutch provided in a downstream position of the dog clutch, comprising an input-side member that is connected to the dog clutch and an output-side member that is connected to the auxiliary drive wheels, which allocates a portion of the drive force from the drive source to the auxiliary drive wheels in accordance with a clutch engagement capacity, and is housed in a clutch case; and a clutch controller that carries out an engagement and disengagement control of the dog clutch and an engagement and disengagement control of the friction clutch, wherein the clutch case comprises a clutch chamber that houses the friction clutch, an oil chamber that is partitioned from the clutch chamber by a partition wall, an oil flow channel that places the clutch chamber in communication with the oil chamber and conveys lubrication oil from the clutch chamber to the oil chamber by a centrifugal force that is generated by a rotation of at least the output side member of the friction clutch, and a passage opening provided in the partition wall that can be opened and closed, and characterised in that, when a disconnected, two-wheel drive mode which releases the dog clutch and the friction clutch is selected, the clutch controller closes the passage opening and stores the lubrication oil in the oil chamber; after selecting the disconnected, two-wheel drive mode, when oil stirring conditions are met, in which the temperature of the lubrication oil in the clutch chamber is elevated, the clutch controller opens the passage opening and causes the lubrication oil to flow from the oil chamber to the clutch chamber.