To provide a light-emitting element with high emission efficiency. In a light-emitting element including an organic compound between a pair of electrodes, the molecular weight X of the organic compound is 450 or more and 1500 or less, and the absorption edge of the organic compound is at 380 nm or more. By liquid chromatography mass spectrometry in a positive mode in which an argon gas is made to collide with the organic compound subjected to separation using a liquid chromatograph at any energy higher than or equal to 1 eV and lower than or equal to 30 eV, a product ion is detected at least around m/z=(X−240).