The present invention relates to a mobile phone holder including a base, the holder: providing a flexible sheet and a sliding device so as to allow the fingers to pass through the arch-shaped flexible sheet during one-handed operations; making one-handed operations easier so as to prevent the mobile phone from dropping during one-handed operations; and allowing the height of the flexible sheet provided in an arch shape to be adjusted, thereby enabling the mobile phone to be put directly on a loading surface and allowing a user to freely use both hands.