The annual exhibition, which begins on Tuesday and runs until Friday, will feature military equipment displayed by exhibitors from countries as far afield as Australia, Brazil and Taiwan.
Also expected are exhibitors from the United States, Canada, Britain, France and Germany.
American-produced weaponry will take centre stage, with the United States as guest nation at this year's event.
First held in 1993, the International Defence Industry Exhibition in Kielce is now in its 27th year. It is billed as one of the largest events of its kind in the world.
Poland's President Andrzej Duda and Defence Minister Mariusz Błaszczak were expected to attend the opening of the trade fair on Tuesday, together with US Ambassador Georgette Mosbacher.
Source: IAR, targikielce.pl