Spanish Communist Workers' Party Antonio García Quejido (16 February 1856 – 13 June 1927) was a Spanish politician, trade unionist, the first president of the Unión General de Trabajadores (UGT) and the first general secretary of the Communist Party of Spain.

From a young age he was a member of the Marxist circle in Madrid led by Pablo Iglesias named Nueva Federación Madrileña, which was a predecessor of the Spanish Socialist Workers' Party.

[1] In 1888, he participated in the founding of the General Union of Workers (UGT), of which he was elected president.

In 1897 he was elected secretary of the national committee of the PSOE, although he left the leadership of the UGT when his proposal for an alliance with the bourgeois republicans was turned down.

[2] After the outbreak of World War I, he was against both imperialist sides, unlike the Allied positions of the majority of the PSOE leaders.