A police spokesman said between 11pm and 1am, a 44-year-old East Perth man was with friends on Burswood Road when he decided to take a walk along Egham Road.
He said an unknown man approached the victim and allegedly attacked him with a knife, resulting in an extensive laceration to his neck.
The victim managed to run away towards Burswood Road before flagging down a taxi that took him to Royal Perth Hospital.
The man's injuries required surgery and 36 staples to close the wound.
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READ NOWPerth Detectives arrested a 24-year-old Bassendean man on August 18 in Beechboro and charged him with a string of offences.
The man was refused bail and appeared in Perth Magistrates Court on August 19.
He was remanded in custody and the case will be in the Stirling Gardens Magistrates Court for a mention only on September 2.