<p>A magnetic head of the present invention includes a pair of substrates which are formed of ferrite and sealed with sealing glass, wherein an averaged thermal expansion ratio of the sealing glass in the range of 30 DEG C to a setting temperature alpha Ts (glass) is smaller than an averaged thermal expansion ratio of the substrate in the range of 30 DEG C to a setting temperature alpha Ts (substrate); and a difference between a thermal expansion ratio at a glass transition temperature of the sealing glass and a thermal expansion ratio at a yielding temperature thereof is 2 x 10<-><3> or less. <IMAGE></p>
