Multilayer ceramic substrate and electronic component

A multilayer ceramic substrate comprising:

• a laminated structure including a surface layer portion located on a surface of the laminated structure and an inner layer portion located on an inner side of the laminated structure, the surface layer portion including a first layer adjacent to the inner layer portion, the inner layer portion including a second layer adjacent to the first layer,
• wherein a first thermal expansion coefficient of the first layer is lower than a second thermal expansion coefficient of the second layer,
• the first layer contains a first glass and the second layer contains a second glass, each of the first glass and the second glass containing 40% or more by weight of MO, where M represents at least one selected from Ca, Mg, Sr, and Ba, and
• a difference between a first softening point of the first glass and a second softening point of the second glass is 60° C. or lower.