A mobile phone with a SIM card holder. The mobile phone includes a body, a holder, and a SIM card. The body includes a first concave portion and a second concave portion. The holder is disposed in the first concave portion of the body in a method such that it is moved between a first position and a second position. The SIM card is disposed in the second concave portion of the body in a detachable method. When the SIM card is disposed in the second concave portion, it is abutted by the holder so that the holder is moved to the second position from the first position. When the SIM card is located in the second concave portion, the holder is located at the first position so as to fix the SIM card in the second concave portion.