Qatar's ambassador to Egypt resumed work on Tuesday at his office in Cairo, UAE-based Sky News Arabia reported.
Qatar had recalled Ambassador Saif Moqadam Al-Boenain on 19 February "for consultation" after Egypt's envoy to the Arab League charged that Doha supports terrorism.
Qatar had criticised unilateral Egyptian airstrikes against Islamic State group targets in Libya following the beheading of Egyptian Copts.
However, the ambassador attended the Arab League summit held in Egypt's Sharm El-Sheikh on 28-29 March with Qatari Emir Sheikh Tamim bin Hamad bin Khalifa, in a possible sign of an ease in tension between the two states.
Cairo has been incensed by Doha's criticism of the post-Morsi government and its hosting of several exiled leaders of the now-banned Muslim Brotherhood.
Egypt had also recalled its ambassador to Doha in February over political tensions and the cabinet said on 6 March that he would not return for now.
However, Qatar has recently distanced itself from the Brotherhood by deporting some of its members to other countries.
Both Egypt and Qatar are part of a military coalition led by Saudi Arabia against Houthi rebels in Yemen.