To provide an antenna assembly structure of a portable radio terminal that can optimally emit aroma or perfume to the outside allowing free attachment/detachment and free exchange without causing a trouble in miniaturization and conversation.

An antenna assembly structure of a portable radio terminal comprises; a helical antenna 201 that is arranged in predetermined distance apart from a rod antenna 301 as a center that an extensible central hole 206 is formed on its upper part; a helical antenna cover 205 that a inner space 207 is formed and fixed on the main body of the device in a connected way; an aroma receiving part 401 that covers the helical antenna cover and has an aromatic 500 and an aroma emitting port 404; a fixing part 410 that fixes the aroma receiving part 401 to the main body of the device in a connected way; an aroma emission opening/closing part 420 that is arranged on the upper part of the aroma receiving part 401 and opens/closes the aroma emitting port 404 of the aroma receiving part 401 by extension and receipt of the rod antenna 301.