Abstract: An anti-electromagnetic wave box for a mobile phone is composed of a first housing and a second housing for receiving a mobile phone therein. The first and second housing are processed with anti-electromagnetic treatment for shielding a user from electromagnetic waves generated by the mobile phone. The first housing has a non-shielded area for covering an aerial of the mobile phone sending and receiving signals. The second housing has a sound hole defined at an upper portion thereof to enable sound waves to transmit out therefrom. A key cover is formed at a lower portion of the second housing for accessibility of a keyboard of the mobile phone. A window is defined between the sound hole and the key cover for visibility of a screen of the mobile phone. Each of the sound hole, the key cover and the window is processed with anti-electromagnetic treatment.