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We present a multiwavelength study of the field containing the unidentifiedX-ray source AX J1639.0-4642, discovered with the ASCA observatory and recentlydetected with the IBIS telescope, onboard the INTEGRAL satellite, dubbed IGRJ16393-4643. The huge hydrogen column density towards the source, the hardspectral index in the 0.7-10 keV band and its flux variability suggest that thesource is a High Mass X-ray Binary (HMXB) enshrouded by dust. Our searchreveals the presence of a non-thermal radio counterpart within the X-ray errorbox. After a study of the broadband emission from X-rays to the radio domain,we propose that AX J1639.0-4642 is a dust-enshrouded Microquasar (MQ)candidate. In addition, the X-ray source is well within the 95% locationcontour of the unidentified gamma-ray source 3EG J1639-4702. The mainproperties of AX J1639.0-4642/3EG J1639-4702 are consistent with those of twoother MQs previously proposed to display high-energy gamma-ray emission.Comment: 7 pages, 5 figures. Accepted for publication in A&A. Title and  discussion on the possible NIR counterpart have been modifie

The dust-enshrouded microquasar candidate AX J1639.0-4642 = IGR J16393-4643