A total of 71 of journalists and media workers have been killed in Pakistan since 2002.
Zaman Mehsud, 38, associated with Urdu newspaper Daily Umet and SANA news agency was shot dead when he was riding a motorcycle in Dibra area of Tank, reported Geo TV.
He also worked for the independent Human Rights Commission of Pakistan.
"We killed him because he was writing against us ... we have some other journalists on our hit list in the region, soon we will target them," Taliban commander Qari Saif Ullah Saif was quoted as saying.
He was a killed just a day after media workers in the world observed the International Day to End Impunity for Crimes against Journalists on November 2.
Pakistan is considered amongst the most dangerous countries of the world for journalists and ranks as the fifth worst in terms of the number of unresolved cases of violence against journalists.