The former Manchester United striker has recently been linked with a surprise move to Arsenal this winter after scoring 19 goals in 25 appearances in all competitions for Bayer in the first half of the season.
However, Voller insists that Chicharito is going nowhere this January as the Gunners rumours continue.
"We're not selling Chicharito to Arsenal or anyone else," Voller told Sky Germany.
"He's not for sale."
Mexico international Chicharito joined Leverkusen from United in the summer and has made an enormous impact at the BayArena since arriving for £7.3million.