Having established himself in the Ekstraklasa with Widzew Łódź, Wichniarek moved to Germany in 1999 to join Bundesliga club Arminia Bielefeld.

Good performances at Arminia Bielefeld earned him a move to Hertha BSC where he did not become a regular starter.

In 1998, Wichniarek joined Widzew Łódź, where he played until 1999, appearing 57 times and scoring 28 goals all together, most of them in the 1998–99 season.

After two seasons in Berlin, in the beginning of 2006, with 44 appearances and four goals on his sheet, he moved back to Arminia Bielefeld.

[6] On 3 July 2009, Wichniarek left the newly relegated Arminia Bielefeld and returned to former club Hertha BSC signing a two-year contract.