TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The hardening agent is an isocyanate type crosslinking agent. The total content of initiator and hardening agent is 40 wt.% or less.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The adhesive further comprises liquid substance (II) having crosslinking reference points other than double bond, and a hardening agent for crosslinking liquid substance (II). In the bulk component of rubber material, liquid substance (II) having a diameter of 0.2-20 mu m is dispersed after crosslinking. The rubber material is chloroprene rubber, chlorosulfonated polyethylene rubber, ethylene-propylene-diene rubber, and/or maleic-acid-modified ethylene-propylene-diene rubber. The rubber material is a compound having a mean molecular weight of 10000-50000 and containing strong polar atoms (2-40 wt.%) in the molecule. The content of rubber material is 50-99 wt.%. Liquid substances (I and/or II) are chosen from substance having polyisoprene skeleton, polybutadiene skeleton, and/or polybutene skeleton. Liquid substance (I) having a double bond used as crosslinking point in the terminal and side chain, is a compound having a mean molecular weight of 1000-5000. Liquid substance (II) has hydroxy group in the terminal, and is a compound having a mean molecular weight of 1000-5000. The total content of liquid substances (I,II) is 1-50 wt.%. Preferred Properties: The storage elastic modulus of the adhesive at 25 degrees C is 4.5x 105 Pa or less as measured before UV curing by dynamic-viscoelasticity spectrum at a frequency of 1 Hz, and the loss tangent (tan- delta ) is 0.43 or more. The storage elastic modulus at 90 degrees C is 7x 104 Pa or less as measured before UV curing, and the loss tangent is 0.81 or more. The storage elastic modulus at 25 degrees C is 4.5x 105 Pa or more as measured after UV curing, and the loss tangent is 0.42 or less. The storage elastic modulus at 90 degrees C is 7x 104 Pa or more as measured after UV curing, and the loss tangent is 0.82 or less.