A device for exchanging tundish nozzles juxtaposed at a bottom of a tundish includes a pair of first arms and a pair of second arms. The pair of first arms presses and supports a first lower nozzle. The first lower nozzle is located at an undersurface of a first upper nozzle. The first upper nozzle us placed at the bottom of the tundish. The pair of second arms presses and supports a second lower nozzle. The second lower nozzle is located at an undersurface of a second upper nozzle. The second upper nozzle is places at the bottom of the tundish and next to the first upper nozzle. The pair of first arms and the pair of second arms are adjoined to each other, and the pairs at least partly overlap each other.