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. ^ { d } 042156 \pm 0. ^ { d } 000004 } ( { 60. ^ { m } 7 } ) .
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 { \dot { P } _ { sh } = 28.3 \times 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 { \dot { P } _ { sh } } .