Variable capacitance device and antenna device

A variable capacitance device comprising:

• a support substrate;
• a plurality of capacitors that are provided on the support substrate and are coupled in series between a first signal terminal electrode and a second signal terminal electrode, each of the plurality of capacitors having a dielectric layer, a lower electrode and an upper electrode, a permittivity of the dielectric layer changing according to a voltage applied to the dielectric layer, the lower electrode and the upper electrode sandwiching the dielectric layer;
• a plurality of resistance films that are provided on the support substrate and are coupled between the plurality of capacitors and a bias terminal electrode;
• a first insulating film that is provided on the support substrate and contacts the plurality of resistance films;
• and
• a second insulating film that is provided on the support substrate and covers the plurality of capacitors, the plurality of resistance films and the first insulating film,
• wherein:
• a thermal conductivity of the first insulating film is larger than that of the second insulating film;
• and
• at least one of the plurality of resistance films has a pair of connection patterns provided on both ends thereof and a plurality of resistance patterns that are coupled in parallel between the pair of connection patterns.