A country is deemed to be in recession when its economy shrinks for two consecutive three-month periods, or quarters.
"Under the weight of immense inflation, the German consumer has fallen to his knees, dragging the entire economy down with him," said Andreas Scheuerle, an analyst at DekaBank.
Germany's inflation rate stood at 7.2% in April, above the euro area's average but below the UK's 8.7%.
Higher prices have weighed on household spending on things such as food, clothing and furniture. Industrial orders are also weaker, reflecting the impact of higher energy prices on businesses.
"The persistence of high price increases continued to be a burden on the German economy at the start of the year," the federal statistics agency Destatis said in a statement.