Nedeljko Čabrinović (Serbian Cyrillic: Недељко Чабриновић; 1 February 1895 – 23 January 1916) was a Bosnian Serb typesetter and political activist, known for his role in the assassination of Archduke Franz Ferdinand in Sarajevo on 28 June 1914.

A member of Young Bosnia, a nationalist revolutionary group advocating for the unification of South Slavs, he was one of six conspirators involved in the assassination attempt.

During the attack, Čabrinović threw a hand grenade at the Archduke's motorcade, but the explosive missed its target and detonated beneath the following vehicle.

He subsequently pursued various apprenticeships before securing a position at a Serbian printing plant in Sarajevo, where he spent two years training as a typesetter.

[3] Čabrinović lived and worked in several cities, including Novi Sad, Karlovci, and Šid, where he was employed at the Socialist Printing House.

[9] While frequenting cafés popular among Bosnian expatriates and Chetnik veterans of the Balkan Wars, Čabrinović and Princip came across a newspaper article detailing the planned visit of Archduke Franz Ferdinand of Austria to Bosnia in June.

[10] Princip, already intent on an assassination, persuaded Čabrinović and Trifko Grabež, the 18-year-old son of a Serbian Orthodox priest, to join the plot to kill the Archduke during his official visit to Sarajevo.

[12] Ciganović then arranged a meeting with Major Vojislav Tankosić, a prominent Chetnik leader and a Black Hand member of Bosnian descent, who provided them with weapons and training in their use.

[13] On 28 June 1914, Archduke Franz Ferdinand of Austria and his wife, Duchess Sophie Chotek, arrived in Sarajevo by train shortly before 10 am.

Just before 10:30 am, as the motorcade passed the central police station, he stood on the riverside of the boulevard and threw his M.12 Vasić hand grenade towards the Archduke's car.

The poison proved non-lethal, causing only foaming at the mouth and vomiting,[13] while the river was only 4 inches (10 cm) deep due to the dry summer.

[18] Following the assassination, Nedeljko Čabrinović was arrested along with twenty-four others, as the investigation identified six primary conspirators involved in the plot to kill Archduke Franz Ferdinand.

[21] His sentence also included one day per month without food or water and annual solitary confinement in total darkness on 28 June, the anniversary of the assassination.

[23] Following World War I, his remains were exhumed and returned to Sarajevo, where he was interred alongside the other conspirators in a common grave at the Vidovdan Heroes Chapel.