  We study the level-spacing distribution function $P(s)$ at the Anderson
transition by paying attention to anomalously localized states (ALS) which
contribute to statistical properties at the critical point. It is found that
the distribution $P(s)$ for level pairs of ALS coincides with that for pairs of
typical multifractal states. This implies that ALS do not affect the shape of
the critical level-spacing distribution function. We also show that the
insensitivity of $P(s)$ to ALS is a consequence of multifractality in tail
structures of ALS.
