Provided is a Mn-Bi-based magnetic powder which has a Sn-containing hexagonal crystal Mn-Bi-based magnetic phase and in which the content of Sn relative to the total content of Mn, Bi and Sn is 0.2-5 at.%. Also provided is a bond magnet containing a kneaded mixture of this Mn-Bi-based magnetic powder and a resin binder. Also provided is a Mn-Bi-based metal magnet which contains a Sn-containing hexagonal crystal Mn-Bi-based magnetic phase and in which the content of Sn relative to the total content of Mn, Bi and Sn is 0.2-5 at.%.