  The existence of glueballs, bound states of gluons, is one of the basic
predictions of QCD; the lightest state is expected to be a scalar. The
experimental situation, however, is still ambiguous. The existence of f_0(1370)
would point to a supernumerous state within the nonet classification of scalars
and would therefore provide a hint towards a glueball. In this talk we
summarize some arguments in favour and against the existence of f_0(1370) and
discuss schemes with and without this state included.
