The present invention relates to a mobile phone case floatable in water, in which a body part made of a material having a smaller density compared to water surrounds a holding part holding a mobile phone, thereby keeping the mobile phone afloat in water. The present invention comprises: a holding part which is made of a soft material surrounding a side surface and a back surface of a mobile phone, and has a hollow rectangular thin film into which the mobile phone is to be inserted, to hold the mobile phone; and a body part which is made of a soft material having a smaller density compared to water, has an upper part and a lower part whose corners protrude, has a recessed middle part, the upper part and the lower part having a thickness greater than the middle part, and has a rectangular hole for accommodating the holding part, to provide a buoyant force.;COPYRIGHT KIPO 2018
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