The Soyuz 7K-LOK, or simply LOK (Russian: Лунный Орбитальный Корабль, romanized: Lunniy Orbitalny Korabl meaning "Lunar Orbital Craft") was a Soviet crewed spacecraft designed to take humans from Earth to orbit the Moon, developed in parallel to the 7K-L1.

The LOK would carry two cosmonauts, acting as a mother ship for the LK lander which would land one crew member to the surface.

Another change to the 7K-LOK was the elimination of the solar panels used on the 7K-OK, replacing them with fuel cells similar to those found on the Apollo CSM.

Additionally, a "cupola" located on the Orbital Module, allowed the cosmonaut in the 7K-LOK to perform the docking procedure with the LK Lander after lunar liftoff.

Only the Descent Module from the 7K-L1, with a thicker, reinforced heatshield, is used on the 7K-LOK and like the 7K-L1, is capable of doing a "skip reentry" so that the Soyuz could be recovered in the Soviet Union.