The invention relates to a micromechanical Coriolis rate of rotation sensor for detecting rates of rotation with components around measuring axes in three spatial directions which are orthogonal to one another. The Coriolis rate of rotation sensor has a substrate, a detection mass and at least two drive masses, wherein the drive masses can each be driven to perform a primary movement relative to the substrate. The direction of the primary movement of one of the at least two drive masses is perpendicular to the direction of the primary movement of another of the at least two drive masses. The detection mass is coupled to the drive masses. The invention also relates to an Inertial Measurement Unit (IMU) and to a method for detecting rates of rotation in three spatial directions which are orthogonal to one another.