An earphone storage device includes a storage body having a bobbin, a track, and two sliders. The bobbin has a peripheral surface, an upper surface, a lower surface, a helical groove, and a protrusion. The helical groove is formed on the peripheral surface. The protrusion extends from the lower surface. The protrusion has a side surface and a hole formed in the side surface. The track is secured to the upper surface of the bobbin. The sliders are disposed on the track. The storage body stores earphones with an audio plug, earphone cords, and a pair of earbuds. The audio plug is inserted into the hole of the protrusion of the bobbin, the earphone cords are wound in the helical groove of the bobbin, and the earbuds are held by the sliders. The earphones can be securely stored, and the earphone cords do not tangle.