The Standard Model predicts a CP-even Higgs boson. Therefore, CP violation in the Higgs sector could be a possible probe for physics beyond the Standard Model. This work presents four recent searches for CP violation in Higgs boson interaction performed by the ATLAS collaboration at the Large Hadron Collider at CERN. These searches utilise the full Run 2 dataset and cover both bosonic and fermionic Higgs interactions. No significant deviations from Standard Model expectations are observed, but limits are placed on relevant parameters in Standard Model effective field theory and on the parameters of the general effective Yukawa interaction.