Jordan offered on Wednesday to hand over an Iraqi woman on death row for her role in a 2005 suicide bomb attack if a Jordanian pilot captured by Islamic State was freed.
Government spokesman Mohammad al-Momani made no mention of Japanese hostage Kenji Goto, a veteran war reporter who is also being held by the insurgent group, Reuters reported.
"Jordan is ready to release prisoner Sajida al-Rishawi if the Jordanian pilot Lieutenant Muath al-Kasaesbeh is released and his life spared," Momani was quoted as saying on state television.
Foreign Minister Nasser Judeh later said a Jordanian request for proof that Kasaesbeh was safe and well had gone unanswered.
The pilot was captured after his jet crashed in northeastern Syria in December during a bombing mission against IS. His fate was thought to be tied to that of Goto after a video was released on Tuesday purporting to show the Japanese national saying he had 24 hours to live unless Jordan released al-Rishawi.
Momani said Jordan's priority was to secure the release of the pilot, who hails from an important Jordanian tribe that forms the backbone of support for the Hashemite monarchy.
