Hippolyte Baraduc (1850–1909) was a French physician and parapsychologist. He is most notable for his claim that that a misty form leaves the human body at the moment of death which he believed was evidence for the soul.

Baraduc claimed that magnetic fields from the human body could be impressed on a photographic plate without the aid of a camera. Influenced by Carl Reichenbach he believed he had discovered evidence for a mysterious vital force inside the human body which he described as a type of fluidic mist. Baraduc had claimed that the human soul emitted a "subtle force" which he could scientifically detect.

Baraduc had invented a biometer, an instrument which he claimed could measure the physical radiation and vibrations of the human soul. His biometer was made of a nonmagnetic, isothermal needle placed on a board, Baraduc would ask his subjects to place their hands above the biometer, he then would attempt to measure the displacement of the needle and the lapse of time during any movement which had been observed.