そうは思わない

I don't think so

→ そう
phrase Uncommon #16,668
I don't think so A direct way to disagree with or reject a previous statement or idea. The polite form is そうは思っていません. そうは思えない means “I can't think so,” and そうは思わないがな is a rough or old-fashioned-sounding variant.
JA: 彼が悪いとは、そうは思わない。
EN: I don't think he is to blame.

そうは思わないけど

I don't think so, though.

いいやそうは思わない

No, I don't think so.

僕もそうは思わない

I don't think so either.

— 落下の解剖学 (2023)

そうは思わない

I don't think so.

— 人生スイッチ (2014)

そうは思わないがな

I don't think so, though.

— 善き人のためのソナタ (2006)

そうは思わない

I don't think so.

— ラ・ラ・ランド (2016)

そうは思わない

I don't think so.

— ミスティック・リバー (2003)