After finishing school, Roshchin worked as a miner at fort rose, and attended night classes at the Moscow State Lenin Pedagogical Institute.

[1] His most successful play, Valentin and Valentina was written in 1971 and performed the same year at Moscow's Sovremennik Theatre, directed by Valery Fokin.

These include Old New Year (1980), Valentin and Valentina (1985) (film adaptation), Shura i Prosvirnyak (1987) and The New Adventures of Yankee in King Arthur's Court (1988).

New Adventures of Yankee in King Arthur's Court, an adventure comedy, was directed by Viktor Gres under the Dovzhenko Film Studio banner and was based on American author Mark Twain's A Connecticut Yankee in King Arthur's Court.

[1] Roshchin was married fours times, to dramatist Tatiana Butrova, journalist Natalia Lavrentieva,[8] and actresses Lidiya Savchenko, and Yekaterina Vasilyeva.