"The party will utilise Modi's services...," Shettar told reporters after the party's foundation day celebrations here.
Modi will campaign in five districts, the Chief Minister said without elaborating. There are 30 districts in the state.
There has been speculation that Modi may not like to involve himself deeply in the May 5 assembly polls in Karnataka where the BJP is facing an uphill task in retaining its turf.
The Gujarat Chief Minister had skipped the BJP's Central Election Committee meeting yesterday that finalised 140 candidates for the Karnataka polls, but party leaders had sought to play it down, explaining he had prior engagements.
Campaigning in Karnataka is, however, not new for Modi who had canvassed for the party in assembly and Lok Sabha polls in 2008 and 2009 respectively.