Breast cancer had been so far the biggest health concern of the women so far.
This is already the case in the UK and Poland, the Annals of Oncology reports.
The trend is increasing in women who started smoking in the 60s and 70s. The lung cancer death rate will continue on its upward trend for the next few years - but with fewer young European women now starting to smoke, it should decrease with time.
In 2013, some 82,640 European women will die from lung cancer, while 88,886 will die from breast cancer.
And by 2015 the balance will have shifted and lung cancer will take the lead, according to Prof Carlo La Vecchia and colleagues.