The invention discloses a device selectively using a shower head and a rain shower. The device is fixedly connected on a support arm tube and comprises a body, a supporting tube, a shower head, a rain shower and a water distribution disk, wherein the body comprises a sleeve body and a division plate which is sealed and fixedly arranged in the sleeve body; the supporting tube is rotatably connected behind the sleeve body and is communicated with a rear chamber; the shower head is communicated with the supporting tube; the rain shower is fixedly connected on the sleeve body and is communicated with a second water outlet; and the water diversion disk is rotatably arranged in the sleeve body, is rotated between a first position and a second position, and is fixedly connected with the supporting tube so as to rotate along with the supporting tube. By rotating the supporting tube, water-discharge switching between the supporting tube and the rain shower can be realized, and therefore the device is convenient to use.