  We propose a class of inflation models in which the coefficient of the
inflaton kinetic term rapidly changes with energy scale. This may occur
especially if the inflaton moves over a long distance during inflation as in
the case of large-scale inflation. The peculiar behavior of the kinetic term
opens up a new way to construct an inflation model. As a concrete example we
construct a linear inflation model in supergravity. It is straightforward to
build a chaotic inflation model with a fractional power along the same line.
Interestingly, the potential takes a different form after inflation because of
the running kinetic term.
