Embodiments of the present invention provide an antenna apparatus and a terminal. The antenna apparatus includes: an antenna body and at least one stub, where a feed terminal is disposed on the antenna body; one end of the stub is electrically connected to a connection point between the feed terminal and a first open-circuit end of the antenna body, and the other end of the stub is an open-circuit end; and an antenna body length between the connection point and the feed terminal is a half of a wavelength corresponding to a specified operating frequency, and a length of the stub is one quarter of the wavelength corresponding to the specified operating frequency.