  We report CCD observations of the dwarf nova V485~Cen during its 1997
superoutburst. The long lasting outburst with characteristic slope, brightness
dip and presence of clear superhumps give evidence that V485 Cen belongs to the
group of SU UMa-type variables. The superhump period is equal to 0.042156 +/-
0.000004 d (60.7 min). Thus V485 Cen has the shortest known period among SU
UMa-type stars, with a period as much as 25% shorter than previously known
objects. The analysis of times of superhump maxima gives clear evidence for the
increase of superhump period with P(dot)=28.3*10^{-5}. This fact confirms the
hypothesis that the shortest periods SU UMa variables contrary to other stars
of this type have positive values of P(dot).
