Jaroš was born in Hybe to a family of a builder. From 1957 to 1962 he studied Slovak and Russian at Comenius University in Bratislava. After finishing college, he worked as an editor at the publishing house Mladé letá. Between 1962 and 1965 he was an editor of the weekly Kultúrny Život, then, until 1971, he worked for Slovak Radio in Bratislava. From 1972 he was a screenwriter and later a playwright at Slovak Motion Picture. He wrote the script for Martin Ťapák's film Pacho the Brigand of Hybe (based on his short story), the script of Juraj Jakubisko's A Thousand-year-old Bee (also based on a Jaroš work) and others, for which he was awarded internationally (Golden Phoenix in the Venice International Film Festival, Union Critics Prize at the Seville Festival of European Cinema).
From 1992-1994 he was a Party of the Democratic Left Member of the National Council of the Slovak Republic From 1996 to 1999 he worked in the National Centre for Slovak Literature. At present he works in the National Centre for Edification in Bratislava.
- Afternoon on Terrace
- Millennial bee
- Mute ear, Dumb eye
- "A Thousand-year-old Bee" (1983)
- "Snow Underfoot" (1978)
- "Pacho the Brigand of Hybe" (1975)
- A Thousand-year-old Bee (1983)
- A day of solstice (1974)
- Price Courage (1986)
- Glasshouse Venus (1985)
- Hudík, Pavol; Trebatická, Heather; Bednár, Lucy (September 2002). In search of Homo sapiens: twenty-five contemporary Slovak short stories. Bolchazy-Carducci Publishers. pp. 113–. ISBN 978-0-86516-532-8. Retrieved 11 June 2011.
- Chitnis, Rajendra A. (2005). Literature in post-communist Russia and Eastern Europe: the Russian, Czech and Slovak fiction of the changes, 1988-1998. Psychology Press. p. 16. ISBN 978-0-415-35557-5.