The Danish army on Wednesday said the military policeman could face up to a year in prison if found guilty of breaking military law.
The investigation into prisoner abuse, which last month prompted Defence Minister Soren Gade to recall the top Danish commander from Iraq, has rocked the Scandinavian nation.
In August, Reserve Capt. Annemette Hommel was sent home to face an army investigation because a civilian interpreter had complained about the way she interrogated prisoners.
The army then said it was investigating several other soldiers and four incidents of abuse.
Army investigators have said she subjected Iraqi prisoners to ill-treatment including verbal humiliation, forcing them to maintain forceful postures and restricting access to food, water and toilets.
Denmark has around 500 troops stationed near the southern Iraqi city of Basra.