A common-mode choke coil includes a multilayer body, and first and second coils incorporated in the multilayer body. The multilayer body is a cuboid shape including plural stacked non-conductor layers. The first coil includes a first coil conductor. The second coil includes a second coil conductor. With the common-mode choke coil, in a frequency region greater than or equal to 0.1 GHz and less than or equal to 100 GHz (i.e., from 0.1 GHz to 100 GHz), the Sdd21 transmission characteristic is less than or equal to −3 dB at or above 30 GHz, and in a frequency region greater than or equal to 10 GHz and less than or equal to 60 GHz (i.e., from 10 GHz to 60 GHz), the Scc21 transmission characteristic is minimum at or above 20 GHz, and the Scc21 transmission characteristic has a minimum value of less than or equal to −20 dB.