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We investigate a beyond standard model (SM) portal scenario for dark matter(DM) particle with leptoquark being the mediator field. Leptoquark, a coloredparticle having both baryon and lepton number, allows the DM to interact withthe SM fields via renormalizable interaction. By focusing on a vectorleptoquark portal with Majorana fermion DM candidate, we find the only unknowncoupling in the model is sensitive to all three main features of a DM modelnamely, relic density, direct detection as well as indirect detection, whilebeing consistent with collider data. We explore the parameter space of theportal with minimum of its field content and find that AMS-02 data forantiproton flux imposes stringent bound till date and excludes the DM mass upto 400GeV. The LUX 2016 data for DM-neutron scattering cross section allows theregion compatible with relic density, however the future sensitivity ofLUX-ZEPLIN experiment can probe the model up to its perturbative limit.

Fermionic dark matter in leptoquark portal