A light emitting device comprising an anode, a cathode, and a first organic layer and a second organic layer provided between the anode and the cathode, wherein the first organic layer is a layer comprising a phosphorescent compound, the second organic layer is a layer comprising at least one of a block copolymer comprising an end group, a block that binds to the end group and a block that does not bind to the end group, and a crosslinked product of the block copolymer, said block that does not bind to the end group comprises at least one constitutional unit selected from the group consisting of a non-crosslinkable constitutional unit represented by the following formula and a non-crosslinkable constitutional unit represented by the following formula, and at least one of the following formulae (i) to (iii) is satisfied when the total number of said non-crosslinkable constitutional unit represented by the formula and the total number of said non-crosslinkable constitutional unit represented by the formula in said block that does not bind to the end group are represented by X I and Z I, respectively, and the total number of said non-crosslinkable constitutional unit represented by the formula and the total number of said non-crosslinkable constitutional unit represented by the formula in said block that binds to the end group are represented by X II and Z II, respectively: X I > X II Z I > Z II X I + Z I > X II + Z II wherein, a X1 and a X2 each independently represent an integer of 0 or more and 10 or less, Ar X1 and Ar X3 each independently represent an arylene group or a divalent heterocyclic group, and the foregoing groups optionally have a substituent, Ar X2 and Ar X4 each independently represent an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the foregoing groups optionally have a substituent, and when a plurality of Ar X2 are present, they may be the same or different and when a plurality of Ar X4 are present, they may be the same or different, R X1, R X2 and R X3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, and the foregoing groups optionally have a substituent, and when a plurality of R X2 are present, they may be the same or different and when a plurality of R X3 are present, they may be the same or different, wherein, Ar Z represents a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the foregoing groups optionally have a substituent. the first organic layer is a layer comprising a phosphorescent compound, the second organic layer is a layer comprising at least one of a block copolymer comprising an end group, a block that binds to the end group and a block that does not bind to the end group, and a crosslinked product of the block copolymer, said block that does not bind to the end group comprises at least one constitutional unit selected from the group consisting of a non-crosslinkable constitutional unit represented by the following formula and a non-crosslinkable constitutional unit represented by the following formula, and at least one of the following formulae (i) to (iii) is satisfied when the total number of said non-crosslinkable constitutional unit represented by the formula and the total number of said non-crosslinkable constitutional unit represented by the formula in said block that does not bind to the end group are represented by X I and Z I, respectively, and the total number of said non-crosslinkable constitutional unit represented by the formula and the total number of said non-crosslinkable constitutional unit represented by the formula in said block that binds to the end group are represented by X II and Z II, respectively: X I > X II Z I > Z II X I + Z I > X II + Z II wherein, a X1 and a X2 each independently represent an integer of 0 or more and 10 or less, Ar X1 and Ar X3 each independently represent an arylene group or a divalent heterocyclic group, and the foregoing groups optionally have a substituent, Ar X2 and Ar X4 each independently represent an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the foregoing groups optionally have a substituent, and when a plurality of Ar X2 are present, they may be the same or different and when a plurality of Ar X4 are present, they may be the same or different, R X1, R X2 and R X3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, and the foregoing groups optionally have a substituent, and when a plurality of R X2 are present, they may be the same or different and when a plurality of R X3 are present, they may be the same or different, wherein, Ar Z represents a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the foregoing groups optionally have a substituent.