A magnetic field generating seat cushion includes a cushion body, and a magnetic field generator, which is mounted in the cushion body, including a main circuit board, an inner coil and an outer coil. The inner and outer coils are electrically connected to the main circuit board. The main circuit board and the outer coil can generate an alternating current to go through the inner coil, causing the inner coil to generate an alternating magnetic field. In comparison to the outer coil, the inner coil has a high number of turns and a relatively smaller area for generating a high strength magnetic field in a small area with low electricity consumption to intermittently oxygenate the body tissues of a person sitting or lying on the cushion body, thereby generating a massage-like effect and achieving muscle-relaxing, blood-circulating and metabolism-enhancing effects.
