An organic light emitting device is disclosed. The organic light emitting device includes a first substrate, a display unit that is positioned on the first substrate and includes a plurality of subpixels, a second substrate facing the first substrate, a seal member attaching the first substrate to the second substrate, and at least one projection. The seal member substantially has a water vapor permeation rate of 10.sup.0 g/m.sup.2 day to 10.sup.3 g/m.sup.2 day. The projection is positioned at a location corresponding to a bezel area of at least one of the first and second substrates.