The utility model discloses an adjustable brassiere with heater strip, including bra body and electric heating wire, bra body 's top fixed mounting has first brassiere to shoulder and second brassiere baldric, bra body 's inside nested keep warm ventilative layer, electric heating wire and the heat dissipation conducting shell installed. The utility model discloses, at first be provided with electric heating wire in bra body 's inside, can utilize the heater strip heating chilly winter, thereby the temperature around the improvement brassiere, provide the temperature for the thorax, make the user feel more comfortable, and this electric heating wire supplies power through button cell, button cell is small, light in weight, according to the automatic silicon steel sheet leveling machine of the transformer, secondly, this electric heating wire takes out in can following bra body, and the outside at the brassiere is provided with ventilative heat preservation, make the application scope of this brassiere wider, both can use in chilly winter, also can use in the summer of sweltering heat, the effect is better.