Electronic device including antenna

An electronic device comprising:

• a first housing including a first space and a first side surface;
• a second housing including a second space in which the first housing is slidably accommodated in a first direction such that a state of the first housing is switched to a drawn-out state and a drawn-in state, and a second side surface corresponding to the first side surface;
• a flexible display disposed to be supported by the first housing and the second housing;
• multiple conductive portions formed to be electrically segmented through at least one first non-conductive portion formed along the first direction and at least one second non-conductive portion formed to cross the first non-conductive portion, in the second side surface;
• a substrate disposed in the first space;
• a wireless communication circuit disposed on the substrate, electrically connected to the multiple conductive portions, and thus configured to transmit and/or receive a wireless signal in at least one frequency band;
• and
• at least one connection terminal, which is electrically connected to the substrate and disposed to face the multiple conductive portions,
• wherein the at least one connection terminal is exposed from the first housing by passing through the first side surface to be in contact with the multiple conductive portions, and
• wherein the at least one connection terminal is continuously electrically connected to at least one conductive terminal of the multiple conductive terminals while a state of the first housing is switched to the drawn-in state and the drawn-out state.