Der arbeyter (דער ארבײטער, 'The Worker') was a Yiddish-language newspaper, issued by the Polish Socialist Party (PPS).

[3] Der arbeyter argued that a Polish democratic republic had to be established in order to achieve Jewish emancipation and socialism.

This approach contrasted the line of the General Jewish Labour Bund, who argued that Jews constituted a separate national group in the Russian empire.

[3] With the arrival of Feliks Sachs, who spoke fluent Yiddish, to the PPS centre in London, two more editions were published in 1901 (April and August).

[9] As of 1905 (the year of revolution in the Russian empire), Der arbeyter had become a weekly paper published from Warsaw and reached a circulation of 20,000.