The arrest warrant was issued Thursday night, Police spokesman Pol Lt Gen Prawut Thawornsiri said.
The warrant states that the man, whose nationality is unknown and who appears to be about 25 to 30 years old and 1.70 cm tall, is wanted on three charges, according to Prawut.
The man who appeared on the CCTV has been charged with having explosives in his possession without license, causing an explosion that could harm others, and premeditated attempts to commit murder.
The man in a blue shirt was seen on CCTV carrying a bag and leaving in on the Taksin Bridge before kicking it down the bridge into the canal near the Sathorn pier at 7pm on August 17, minutes after the explosion at the Erawan Shrine near the Ratchaprasong Intersection.
The bomb exploded at 1pm on August 18.
Prawut said police were now trying to enhance the image of the suspect seen on the CCTV and would interrogate more witnesses.
Police believe the two suspects have several other accomplices.