The present invention relates to a system for placing a subject into virtual reality, wherein said system includes an enclosed spherical envelope which defines a real space and is mounted on stands so as to be capable of rotation about its own centre. This envelope comprises at least one hatch with a lid for the subject to climb in or out of said envelope. This system also includes a device for generating a virtual space, as well as a device for displaying said virtual space to the user which is connected to the generation device. The system further includes a unit for modifying the virtual reality according to the physical displacements of the user within the envelope, wherein said unit is connected to a device for measuring the values and directions of the user's displacements relative to the envelope. The envelope is placed on at least three wheel stands whose rotation axes are directed towards the centre of the sphere and offset relative to rotation axis of the wheel.