Interlayer for laminated glass, and laminated glass

An interlayer film for laminated glass, comprising:

• a first layer containing a combination of polyvinyl acetal resin and plasticizer;
• and
• a second layer containing a combination of polyvinyl acetal resin and plasticizer,
• the second layer being arranged on a first surface side of the first layer,
• the combination of polyvinyl acetal resin and plasticizer contained in the first layer being a combination of polyvinyl butyral resin and triethylene glycol di-2-ethylhexanoate,
• the combination of polyvinyl acetal resin and plasticizer contained in the second layer being a combination of polyvinyl butyral resin and triethylene glycol di-2-ethylhexanoate,
• the polyvinyl butyral resin in the first layer being obtained by acetalizing polyvinyl alcohol with only one aldehyde, the aldehyde consisting of n-butyraldehyde,
• a content of the triethylene glycol di-2-ethylhexanoate in the first layer being 60 parts by weight or more relative to 100 parts by weight of the polyvinyl butyral resin in the first layer,
• a content of the triethylene glycol di-2-ethylhexanoate in the second layer being 30 parts by weight or more relative to 100 parts by weight of the polyvinyl butyral resin in the second layer,
• the interlayer film having one end and the other end being at the opposite side of the one end and having a thickness thicker than the one end,
• the interlayer film having a region where the thickness is increased in a direction from the one end to the other end, and
• the interlayer film having a portion where the amount of increase in the thickness is increased in a direction from the one end to the other end in the region where the thickness is increased, or having a portion where the amount of increase in the thickness is decreased in a direction from the one end to the other end in the region where the thickness is increased,
• a ten-point average roughness Rz of a surface of the interlayer film at a center position of the portion where the amount of increase in the thickness is increased, or the portion where the amount of increase in the thickness is decreased being 20 μm or more, and the maximum thickness of the interlayer film being 0.87 mm or more.