A maniac charged with shoving a 64-year-old painter onto the subway tracks at a Queens station was sent to jail Saturday as prosecutors revealed the victim suffered a head wound that required four staples to close.

Terrell Jarrett snuck under a turnstile at the Parsons Boulevard F-train station around 5:30 a.m. on May 31 and walked up behind victim Orlando Cabrera and pushed him, according to a criminal complaint.

“(Cabrera) was sitting on a bench at a subway platform…when a male wearing a dark colored sweatshirt and red pants pushed him from behind causing him to fall onto the subway tracks,” authorities said in the complaint.

Cabrera, who had been headed to work, also suffered from multiple cuts to his face and arm.

Jarrett, 37, “snuck up behind me and took me by surprise” Cabrera told The Post, adding the incident left him “bathed” in his own blood.

Video surveillance shows Jarrett walked out of the station a minute after he allegedly pushed Cabrera, the complaint said.

Jarrett was charged with attempted murder, assault and criminal possession of a controlled substance after cops arrested him and found a pipe with crack cocaine in his pocket, the documents alleged.

Judge Danielle Hartman ordered Jarrett, who has six prior arrests, held without bail and ordered him to undergo a psychiatric evaluation.