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Carbon microcoils (CMCs) have an interesting 3D-helical/spiral form with a coil diameter of micrometer orders and a coil length of mm orders. Pulverized CMCs are generally embedded into polymer matrix to form CMC/polymer composites for various applications. The CMCs are very interested as a possible candidate for electromagnetic absorbers, remote microwave heating elements, microwave visualization materials, tactile and nearness sensors, chiral catalyst, etc. In this review, the preparation conditions, morphology, some properties and possible applications of the CMCs are briefly introduced.† This report was originally printed in J. Soc. Powder Technology, Japan, 42, 715-720 (2005) in Japanese, before being translated into English by KONA Editorial committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.