NOVELTY - A resin sheet (1) has a sealing layer (3) for enclosing an organic electroluminescent element in portion(s). The sealing layer contains thermoplastic resin, tackifying resin, and organometallic compound (I), as main components. The resin sheet has light transmittance with wavelength of 550 nm in thickness of 0.1 mm with respect to light of 85% or more. The thermoplastic resin contains hydride of A-B-A-type(s) of styrene system triblock material.    USE - Resin sheet is used for image display apparatus (claimed) and light emission system of organic electroluminescent device. Uses include but are not limited to organic electroluminescent display, organic electroluminescent illumination, organic semiconductor, organic solar cell, liquid crystal display and light-emitting diode illumination.    ADVANTAGE - The resin sheet has excellent water absorption property and flexibility, and low moisture permeability, with suppressed generation of dark spot, and provides image display apparatus having improved transparency and visibility of image.    DETAILED DESCRIPTION - A resin sheet has a sealing layer for enclosing an organic electroluminescent element in portion(s). The sealing layer contains thermoplastic resin, tackifying resin, and organometallic compound of formula (I), as main components. The resin sheet has light transmittance with wavelength of 550 nm in thickness of 0.1 mm with respect to light of 85% or more. The ratio (AM/Y) of product (AM) of acid value (A in mgCH3ONa/g) other than organometallic compound (I) and weight average molecular weight (M) of organometallic compound (I), with respect to weight ratio (Y) of organometallic compound (I) with respect to 100 pts. wt. resin components, is less than 162. The thermoplastic resin contains hydride of A-B-A-type(s) of styrene system triblock material.    R1-R4=organic group including 1-8C alkyl, aryl, alkoxy, cycloalkyl or acyl;and    M=trivalent metal atom.    An INDEPENDENT CLAIM is included for image display apparatus, which has an organic electroluminescent element and/or sealing substrate provided in surface of the organic electroluminescent element, and the resin sheet interposed between the organic electroluminescent element and sealing substrate.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of resin sheet.    Resin sheet (1)    Base material sheet (2)    Sealing layer (3)    Release film (4)