A protective device for a mobile terminal includes a glass window and a glass case housed in the mobile terminal and formed with glass of a three-dimensional curved surface form having a circumferential edge lower than the center, the protective device includes: a first peripheral protection portion housed along a circumferential edge of the glass window and in which a tangent line in which a portion thereof contacts with a surface of the glass window forms an angle of 0° or more with a horizontal line; and a second peripheral protection portion housed along a circumferential edge of the glass case and in which a tangent line in which a portion thereof contacts with a surface of the glass case forms an angle of 0° or more with a horizontal line.