Waterproof case for mobile phone

The present invention relates to a waterproof case for a mobile phone, which is capable of protecting, from water, valuables such as a mobile phone and, particularly, is capable of protecting the valuables from water by storing the valuables in the waterproof case for a mobile phone when swimming or when it rains. Specifically, the purpose of the present invention is to simplify an operating method and increase a waterproofing effect. To this end, the present invention performs a primary waterproofing by folding a sealing part made from a hard synthetic resin material at the upper side of the waterproof case for the mobile phone, and performs a secondary waterproofing by providing a cover part encompassing and fixed to the outer surface of the sealing part, and the cover part has pressing parts formed on both sides thereof to press the sealing part and prevent the water from permeating into the case, thereby maximizing a waterproofing effect.