A protective case for an electronic device contains a first covering part and a second covering part which are connected together to define a hollow accommodation chamber for housing an electronic device. The second covering part couples with a back face of the electronic device and includes a heat removal groove for accommodating a heat dissipation plate, and when the electronic device is housed in the accommodation chamber, it contacts with the heat dissipation plate. The first covering part connects with a front face of the electronic device by using its internal face and includes a transparent visible window aligning with a touch screen of the front face of the electronic device. The accommodation chamber includes at least one receiving interface corresponding to at least one peripheral port of the electronic device and includes at least one button port for extending at least one button of the electronic device outwardly.