The　magnetic　response　of　hybrid　capacitors　(HCs)　has　become　an　essential　topic　in　practical　applications　and　fundamental　research,　but　because　of　the　complicated　contact　surface　between　the　electrode　and　electrolyte,　identifying　the　effect　of　the　morphologies　of　electrodes　on　the　magnetic　response　remains　challenging.　Here,　we　prepared　needle-,　weed-　and　net-like　Co3O4　as　electrodes　to　investigate　the　morphology-dependent　HCs　properties　under　a　magnetic　field　(MF).　The　results　showed　that　the　capacity　of　the　needle-　and　weed-like　electrode　changes　in　a　range　of　5.8　%　to　−23.2　%　and　12.8　%　to　−5.1　%　at　a　scan　rate　from　5　to　100　mV/s　with　a　4000Gs　magnetic　field,　while　that　of　net-like　electrode　changes　from　45.3　%　to　41.3　%.　The　different　magnetic　response　is　attributed　to　the　effect　of　the　morphology　on　electrolyte　convection　under　an　external　magnetic　field.　This　work　favours　understanding　the　magnetic　dependence　of　HCs　properties　and　pushes　the　practical　application　of　HCs　in　magnetic　environments.　©　2022　Wiley-VCH　GmbH.