Intermediate film for laminated glass and laminated glass

An interlayer film for laminated glass having a three or more-layer structure,

• the interlayer film including a first layer, a second layer, and a third layer,
• the first layer is arranged on a first surface side of the second layer, and the third layer is arranged on a second surface side opposite to the first surface of the second layer,
• the interlayer film having one end, and the other end being at an opposite side of the one end,
• each layer contained in the interlayer film having one end, and the other end being at an opposite side of the one end,
• the one end of the each layer being located at the one end side of the interlayer film in a direction connecting the one end and the other end of the interlayer film, the other end of the each layer being located at the other end side of the interlayer film in the direction connecting the one end and the other end of the interlayer film, and
• in the interlayer film, a thickness of the other end being larger than a thickness of the one end,
• wherein, in the first layer, a thickness at the other end is smaller than a thickness at the one end, the first layer contains a thermoplastic resin, the thermoplastic resin in the first layer contains a polyvinyl acetal resin, a content of the polyvinyl acetal resin in the first layer is 50% by weight or more based on 100% by weight of the thermoplastic resin in the first layer, and
• wherein, in the third layer, a thickness at the other end is smaller than a thickness at the one end, the third layer contains a thermoplastic resin, the thermoplastic resin in the third layer contains a polyvinyl acetal resin, a content of the polyvinyl acetal resin in the third layer is 50% by weight or more based on 100% by weight of the thermoplastic resin in the third layer.