A multiband antenna includes a base board, a feed member, a first grounding connector, a second grounding connector, a first radio member, a second radio member, a third radio member and a fourth radio member. The feed member, the first grounding connector and the second grounding connector are all electronically connected to the base board. The first radio member is electronically connected to the feed member and the first grounding connector. The second radio member is electronically connected to the first radio member. The third radio member is electronically connected to the first radio member. The fourth radio member is electronically connected to the second grounding connector. In use, the multiband antenna sends/receives wireless signals in different working frequencies by the radio members.