Meanwhile growth in demand for house purchase loans slowed sharply in January-March compared with the previous quarter.
The poll found banks expect mortgage demand to shrink to levels "similar to the realised level in the second half of 2008", after the collapse of the Lehman Brothers bank.
The regular survey found government and central bank interventions helped hold banks back from locking down businesses' access to credit as in previous crises. Compared with the financial and sovereign debt crises of the late 2000s and early 2010s, banks imposed only a "small" tightening of their standards for which companies should receive loans, the ECB said.