A swing analyzing device includes at least an angular velocity sensor, a data acquiring unit, and a motion detecting unit. The angular velocity sensor detects angular velocities generated about a plurality of axes by a swing. The data acquiring unit acquires detection data of the angular velocity sensor. The motion detecting unit detects at least one of motions of the swing. Particularly, the motion detecting unit includes an angular velocity calculating unit which calculates the sum of the magnitudes of the angular velocities generated about the plurality of respective axes using the acquired detection data.