This paper reports a method of controlling the orientation of adherent fibroblastic cells (osteoblasts) by utilizing a ferromagnetic particle chain and a diamagnetic collagen under exposure to magnetic fields. A cell culture medium with cells and magnetic particles (γ-Fe2O3) was mixed with a collagen solution and incubated for 24h. During the first 3h of incubation, the medium in the cell culture dish was exposed to magnetic fields of up to 8T. The exposure caused the aggregation of magnetic particles (MPs), which formed chains in parallel with the magnetic field and at the same time oriented the polymerized collagen fibers perpendicular to the magnetic field. A lattice pattern of MP chains and collagen fibers was observed on the bottom of the culture flask. After 24h of incubation, the spindlelike cells had become oriented in parallel with the MP chains or the collagen fibers. The results indicate the possibility of a technique of cellular manipulation with MP-collagen hybrid that could be used to control cellular orientation.